Breadcrumb: Home; Products; Integrated RJ45 Connector; Single Port RJ45 Connector; 10/100 Base-T RJ45 Connector; 172374

Click to open expanded view

LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector Single Port Tab Up Without Led

Name: LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector Single Port Tab Up Without Led
Brand: LINK-PP
SKU: 172374
Price: 1.7 AUD
Availability: InStock
Rating: 5 (33 reviews)

Product: LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector Single Port Tab Up Without Led
SKU: 172374
P/N: LPJ16211CNL
Price: A$ 3.616
Stock: 5000 in Stock
Sold: 367K
Product URL: https://www.l-p.com/products/470350.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

33 Reviews

0 Questions

367K Sold

A$ 2.601

Free shipping over $600. For wholesale pricing, please contact us directly.

Qty (pcs) :

Unit Price :

A$ 3.616

100

A$ 2.965

600

A$ 2.604

1200

A$ 1.99

6000

A$ 1.7

P/N: LPJ16211CNL SKU: 172374

Compatible:: LINK-PP; Halo

Compatible P/N:: LPJ16211CNL

Shipping:

To Be Negotiated

A$ 46.44

Can't deliver

to Australia via FedEx IP

Estimated delivery time : 3 - 6 days.

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

Total Price:

{{ lpMoneyText(detail_data.displayed_price.unit_prefix, detail_data.displayed_price.total, detail_data.displayed_price.unit_suffix) }}

{{ lpMoneyText(detail_data.displayed_price.unit_prefix, detail_data.displayed_price.original_total_price, detail_data.displayed_price.unit_suffix) }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Packaging Details:

N.W/pcs: 0.007kg
Package: Tray
SPQ: 50pcs
Qty/carton: 1200pcs
Carton size: 32*30*31cm
G.W./carton: 8.5kg

Description
Specification
Matching Products
Download
Q&A
Customer Reviews

LINK-PP LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector for Industrial PC and Fieldbus System (Single Port, Tab Up, Without Led)

The LPJ16211CNL supports speed 10/100 Base-T, It is compliant to IEEE 802.3, UL, Reach, RoHs, ISO19001,ISO14001 standards.It can be used to support application, such as Smart Meters, Router, Automation and Network Firewall.

LINK-PP Part Number:	LPJ16211CNL	Connector Type	Jack
Part Status	Active	Mounting Type	Through Hole
Number of Positions/Contacts	8p8c (RJ45, Ethernet)	Application-Lan	Ethernet(NoN PoE)
Number of Ports	1x1 Port	Speed	10/100 Base-T
Latch	Up	Cores per Port	4
Orientation	90° Angle (Right)	PCB Mount Angle	SIDE ENTRY
Shield EMI Tabs	With	LED Option	Without Leds
PCB	FR4	PCB Retaining Post	T POST
Package Height (Inches/mm)	0.535/13.60	Package Length (Inches/mm)	0.846/21.50
Package Width (Inches/mm)	0.630/16.00	Temperature	0℃ TO 70℃
Bst Circuit	Yes	AutomDX	YES
Diodes	-	Contact Mating Area Plating	GOLD 6u"/15u"/30u"
Turns Ratio RX/TX	1CT:1CT	Configuration RX/TX	T,C

RJ45 MagJack

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing LPJ16211CNL-Drawing.pdf Download

Questions & Answers
Ask a Question

No data

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

M***n

Austria

Verified Purchase

5 .0

2023-06-19

The part I ordered came quickly and worked fine

39 Helpful vote Comments

I***e

Italy

Verified Purchase

5 .0

2023-06-12

Very satisfied, Got what I ordered very fast and it exactly what I ordered.

46 Helpful vote Comments

D***a

Nepal

Verified Purchase

5 .0

2023-05-29

Great products and prices. will shop here again.

44 Helpful vote Comments

C***n

Austria

Verified Purchase

5 .0

2023-02-03

Using this in a Intercom. Detected right away and no issues. Price is great

52 Helpful vote Comments

J***e

United States

Verified Purchase

5 .0

2022-10-17

Thank you so much. Would shop again

29 Helpful vote Comments

J***n

Bangladesh

Verified Purchase

5 .0

2022-10-16

I received my product even sooner than expected. The price was the best on the web and the product works perfectly.

75 Helpful vote Comments

L***n

Russian Federation

Verified Purchase

5 .0

2022-10-07

The same functionality at a much lower cost, no reason to reject.

50 Helpful vote Comments

G***a

Argentina

Verified Purchase

5 .0

2022-10-05

As always, good products, easy ordering and fast delivery.

93 Helpful vote Comments

J***e

Belarus

Verified Purchase

5 .0

2022-09-27

I like this company, great deals and easy to work with.

14 Helpful vote Comments

D***r

India

Verified Purchase

5 .0

2022-09-22

It has now been in use for a while and works perfectly!!

47 Helpful vote Comments

M***s

Iran, Islamic Republic of

Verified Purchase

5 .0

2022-08-17

I am a repeat customer because I can always find what I need at very good prices on l-p.com. It really helps me a lot. Will use again when needed.

88 Helpful vote Comments

Z***a

Ireland

Verified Purchase

5 .0

2022-07-29

Quick delivery and great item. works perfect.

43 Helpful vote Comments

B***s

India

Verified Purchase

5 .0

2022-05-02

No problem so far after quite a few orders over the past few years.

47 Helpful vote Comments

G***r

Malaysia

Verified Purchase

5 .0

2022-02-11

Arrived as advertised, installed it and away we went.

21 Helpful vote Comments

Y***z

Mexico

Verified Purchase

5 .0

2022-01-31

Great service and was a great price compared to other sources.

53 Helpful vote Comments

P***l

Romania

Verified Purchase

5 .0

2021-12-22

high quality item & super fast shipping

63 Helpful vote Comments

N***p

Thailand

Verified Purchase

5 .0

2021-12-02

Second time to order this RJ45 Mag Jack, used them to replace our previous one, work well and we are happy with them. I will have a look for the other products and see if we can get some also.

72 Helpful vote Comments

A***r

Malaysia

Verified Purchase

5 .0

2021-09-23

Very surprised with the fast shipping. Great shopping experience with LINK-PP!

49 Helpful vote Comments

J***g

Australia

Verified Purchase

5 .0

2021-07-26

Easy website, fast service!

48 Helpful vote Comments

Y***o

United States

Verified Purchase

5 .0

2021-04-25

Went above and beyond. Nothing beats l-p.com! Could not ask for speedier service. Really a marvel of customer support and satisfaction! Will do business again and again!

45 Helpful vote Comments

K***s

Spain

Verified Purchase

5 .0

2021-03-30

hello ni hao

56 Helpful vote Comments

R***e

United States

Verified Purchase

5 .0

2021-03-23

Everything went very smoothly.

16 Helpful vote Comments

B***f

Netherlands

Verified Purchase

5 .0

2021-02-27

Worked fine in a DELL PoE switch.

96 Helpful vote Comments

S***i

Israel

Verified Purchase

5 .0

2020-10-11

Good selection and good price of products, easy checkout

38 Helpful vote Comments

F***o

Malaysia

Verified Purchase

5 .0

2020-08-26

I have ordered various items over the past couple of years, goods always arrive in a timely manner. They are well packed and do exactly what you expect them to do. Great value for money and efficient service.

21 Helpful vote Comments

J***n

Philippines

Verified Purchase

5 .0

2020-06-26

Always professional service and great pricing. packages often received earlier than promised.

52 Helpful vote Comments

P***n

Philippines

Verified Purchase

5 .0

2020-05-10

They are working perfectly, and the price is really competitive.

43 Helpful vote Comments

F***l

United States

Verified Purchase

5 .0

2019-11-19

Awesome service and great price. Will recommend this company to my friends and family.

33 Helpful vote Comments

J***e

Israel

Verified Purchase

5 .0

2019-10-09

Easier than going to the store, guaranteed service and product delivery. Pleasure to work with on any transaction level.

48 Helpful vote Comments

M***r

Australia

Verified Purchase

5 .0

2019-09-11

l-p.com provided excellent customer service again and helped us to get what we were looking for.

72 Helpful vote Comments

A***a

United States

Verified Purchase

5 .0

2019-08-21

Outstanding service and delivery.

85 Helpful vote Comments

R***y

Netherlands

Verified Purchase

5 .0

2019-04-23

It came sooner than I expected!

31 Helpful vote Comments

J***n

Morocco

Verified Purchase

5 .0

2019-02-20

Need 4pcs Integrated RJ45 Magjack in our repairs. So we went to l-p for some help , link-pp replaced it perfectly and support small quantity . We are quite satisfied.

99 Helpful vote Comments

Verified Purchase

{{comments.rating}}.0

Showing {{comments.replies.length}} comment

{{reply_items.topic || reply_items.text}}By {{reply_items.author}}

{{comments.helpfulvote}} Helpful vote Comments

{{pageindex}}

Not yet rated . Be the first to Write a Review

You May Also Like

LINK-PP

LPJ0155HENL

10/100 Base-T RJ45 PoE MagJack With Rectifier Bridge Green/Yellow LED Tab Down

40 Reviews
|
31.6K Sold

A$ 7.355 ~~A$ 0.00~~

{"pid":470305,"minimum_ordered_quantity":1,"skulist":[{"pskuid":172323,"cid":752,"pid":470305,"sku":"172323","psvid1":262913,"psvid2":262914,"psvid3":0,"psvid4":0,"left_num":1200,"price":"5.291","strike_price":"0.000","innercode":"","addtime":"2023-07-02 10:59:36","uptime":"2023-07-02 23:59:36","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"5.29","subtotal":5.29}]}
LINK-PP

LPJ0190HENL

RJ45 PoE Magjack 10P8C 10/100 Base-T Tab Down Green/Yellow Led

84 Reviews
|
10.9K Sold

A$ 7.355 ~~A$ 0.00~~

{"pid":457553,"minimum_ordered_quantity":1,"skulist":[{"pskuid":142574,"cid":752,"pid":457553,"sku":"142574","psvid1":246845,"psvid2":246846,"psvid3":0,"psvid4":0,"left_num":950,"price":"5.291","strike_price":"0.000","innercode":"","addtime":"2021-09-05 05:50:59","uptime":"2022-05-25 23:40:30","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"5.29","subtotal":5.29}]}
LINK-PP

LPJ0190-8GDNL

10/100 Base-T PoE Jack RJ45 Connector With Rectifier Bridge Tab Down Yellow/Green Led

9.1K Sold

A$ 7.355 ~~A$ 0.00~~

{"pid":481908,"minimum_ordered_quantity":1,"skulist":[{"pskuid":184979,"cid":752,"pid":481908,"sku":"184979","psvid1":271777,"psvid2":271778,"psvid3":0,"psvid4":0,"left_num":660,"price":"5.291","strike_price":"0.000","innercode":"","addtime":"2024-10-21 13:15:40","uptime":"2024-10-22 02:15:40","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"5.29","subtotal":5.29}]}
LINK-PP

LPJ0190CNL

10/100 Base-T RJ45 PoE Magjack With Rectifier Diode Tab Down Without Led

18 Reviews
|
16K Sold

A$ 7.285 ~~A$ 0.00~~

{"pid":474023,"minimum_ordered_quantity":1,"skulist":[{"pskuid":178259,"cid":752,"pid":474023,"sku":"178259","psvid1":266859,"psvid2":266860,"psvid3":0,"psvid4":0,"left_num":4000,"price":"5.241","strike_price":"0.000","innercode":"","addtime":"2024-01-11 09:43:33","uptime":"2024-01-11 22:43:33","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"5.24","subtotal":5.24}]}
LINK-PP

LPJK1014AGNL

10/100 Base-T RJ45 Magnetic Jack With POE 1x1 Port Tab Up Yellow/Green Led

48 Reviews
|
9.3K Sold

A$ 6.742 ~~A$ 0.00~~

{"pid":470259,"minimum_ordered_quantity":1,"skulist":[{"pskuid":172277,"cid":752,"pid":470259,"sku":"172277","psvid1":262856,"psvid2":262857,"psvid3":0,"psvid4":0,"left_num":1239,"price":"4.850","strike_price":"0.000","innercode":"","addtime":"2023-06-27 13:18:04","uptime":"2023-06-28 02:18:04","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.85","subtotal":4.85}]}
LINK-PP

LPJ4112GENL

10/100 Base-T Tab Down Green/Yellow Led Single Port POE Rectifier Bridge RJ45 Female Connector

71 Reviews
|
2.2K Sold

A$ 6.742 ~~A$ 0.00~~

{"pid":457265,"minimum_ordered_quantity":1,"skulist":[{"pskuid":142018,"cid":752,"pid":457265,"sku":"142018","psvid1":246410,"psvid2":246411,"psvid3":0,"psvid4":0,"left_num":115,"price":"4.850","strike_price":"0.000","innercode":"","addtime":"2021-08-02 05:37:28","uptime":"2022-05-24 00:55:40","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.85","subtotal":4.85}]}
LINK-PP

LPJP4155CNL

10/100 Base-T RJ45 PoE+ Jack With Rectifier Bridge Tab Down Without Led

42 Reviews
|
38.5K Sold

A$ 6.226 ~~A$ 0.00~~

{"pid":470363,"minimum_ordered_quantity":1,"skulist":[{"pskuid":172394,"cid":752,"pid":470363,"sku":"172394","psvid1":263012,"psvid2":263013,"psvid3":0,"psvid4":0,"left_num":1000,"price":"4.479","strike_price":"0.000","innercode":"","addtime":"2023-07-06 12:35:58","uptime":"2023-07-07 01:35:58","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.48","subtotal":4.48}]}
LINK-PP

LPJ16258AENL

RJ45 PoE Connector with 10/100 Base-T Integrated Magnetics Single Port Tab Up Green/Yellow Led

17 Reviews
|
19.3K Sold

A$ 6.13 ~~A$ 0.00~~

{"pid":474344,"minimum_ordered_quantity":1,"skulist":[{"pskuid":178693,"cid":752,"pid":474344,"sku":"178693","psvid1":267390,"psvid2":267391,"psvid3":0,"psvid4":0,"left_num":1727,"price":"4.410","strike_price":"0.000","innercode":"","addtime":"2024-03-18 10:22:46","uptime":"2024-03-18 23:22:46","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJP4190CNL

10/100 Base-T RJ45 PoE+ MagJack With Rectifier Bridge Tab Down Without Led

50 Reviews
|
119.5K Sold

A$ 6.129 ~~A$ 0.00~~

{"pid":470359,"minimum_ordered_quantity":1,"skulist":[{"pskuid":172390,"cid":752,"pid":470359,"sku":"172390","psvid1":263006,"psvid2":263007,"psvid3":0,"psvid4":0,"left_num":2000,"price":"4.409","strike_price":"0.000","innercode":"","addtime":"2023-07-06 10:11:06","uptime":"2023-07-06 23:11:06","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJ0049AENL

10/100 Base-T Rj45 Connector Transformer With Tvs Diode Single Port Tab Down Green/Yellow Led

24 Reviews
|
690 Sold

A$ 6.129 ~~A$ 0.00~~

{"pid":457483,"minimum_ordered_quantity":1,"skulist":[{"pskuid":142500,"cid":752,"pid":457483,"sku":"142500","psvid1":246823,"psvid2":246824,"psvid3":0,"psvid4":0,"left_num":1718,"price":"4.409","strike_price":"0.000","innercode":"","addtime":"2021-08-31 15:06:30","uptime":"2022-12-13 00:24:59","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJK0036A8NL

100/1000 Base-T Tab Up Green/Yellow&Green Led 32.5mm 1x1 Port RJ45 Network Jack

56 Reviews
|
27.2K Sold

A$ 6.129 ~~A$ 0.00~~

{"pid":460986,"minimum_ordered_quantity":1,"skulist":[{"pskuid":155394,"cid":752,"pid":460986,"sku":"155394","psvid1":252542,"psvid2":252543,"psvid3":0,"psvid4":0,"left_num":1300,"price":"4.409","strike_price":"0.000","innercode":"","addtime":"2022-02-28 10:14:01","uptime":"2022-12-08 19:57:33","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJ16047A10NL

Single Port RJ45 POE Magjack For 100 Base-T With Rectifier Bridge Yellow/Green Led

69 Reviews
|
30.1K Sold

A$ 6.129 ~~A$ 0.00~~

{"pid":457277,"minimum_ordered_quantity":1,"skulist":[{"pskuid":142123,"cid":752,"pid":457277,"sku":"142123","psvid1":246514,"psvid2":246515,"psvid3":0,"psvid4":0,"left_num":907,"price":"4.409","strike_price":"0.000","innercode":"","addtime":"2021-08-04 12:07:07","uptime":"2022-12-11 21:57:24","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJ3190AENL

10/100 Base-T RJ45 PoE MagJack With Rectifier Bridge Tab Up Green/Yellow LED

48 Reviews
|
21.6K Sold

A$ 6.129 ~~A$ 0.00~~

{"pid":470331,"minimum_ordered_quantity":1,"skulist":[{"pskuid":172354,"cid":752,"pid":470331,"sku":"172354","psvid1":262965,"psvid2":262966,"psvid3":0,"psvid4":0,"left_num":900,"price":"4.409","strike_price":"0.000","innercode":"","addtime":"2023-07-04 13:16:49","uptime":"2023-07-05 02:16:49","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.41","subtotal":4.41}]}
LINK-PP

LPJK0200AWNL

100/1000 Base-T RJ45 Magnetics Modular Jack 32.5mm Tab Up Green/Green Led

33 Reviews
|
17.2K Sold

A$ 6.094 ~~A$ 0.00~~

{"pid":471841,"minimum_ordered_quantity":1,"skulist":[{"pskuid":175185,"cid":752,"pid":471841,"sku":"175185","psvid1":264822,"psvid2":264823,"psvid3":0,"psvid4":0,"left_num":2869,"price":"4.384","strike_price":"0.000","innercode":"","addtime":"2023-08-16 11:41:18","uptime":"2023-08-17 00:41:18","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.38","subtotal":4.38}]}
LINK-PP

LPJ0049CNL

10/100 Base-T POE RJ45 connector Single Port Tab Down Without Led

15 Reviews
|
721 Sold

A$ 6.007 ~~A$ 0.00~~

{"pid":468442,"minimum_ordered_quantity":1,"skulist":[{"pskuid":169504,"cid":752,"pid":468442,"sku":"169504","psvid1":261084,"psvid2":261085,"psvid3":0,"psvid4":0,"left_num":5250,"price":"4.321","strike_price":"0.000","innercode":"","addtime":"2022-09-13 10:31:03","uptime":"2022-12-13 00:25:39","status":0}],"shippingLists":[{"id":"FEDEX","name":"FedEx IP","logo":"res\/shipping\/FEDEX.jpg","price":"29.47","isfree":0,"total":"29.47","datemin":3,"datemax":6,"unit_price":"4.32","subtotal":4.32}]}

Recently Viewed

{{ item.sold_num }} Sold

{{ lpMoneyText(detail_data.displayed_price.unit_prefix, item.displayed_price.value || item.displayed_price.min, detail_data.displayed_price.unit_suffix) }}

LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector Single Port Tab Up Without Led

Product Details

LINK-PP LPJ16211CNL 10/100 Base-T RJ45 MagJack Female Connector for Industrial PC and Fieldbus System (Single Port, Tab Up, Without Led)

Matching Products

Download

Questions & Answers

Customer Reviews

{{comment.count}} reviews

You May Also Like

Recently Viewed

{{status_back_til}}

Added to Cart ({{ cart_pro_response.products.info.items.length }} {{ cart_pro_response.products.info.items.length === 1 ? 'item' : 'items' }})

{{addwish_back.addwish_status}}

Add to Inquiry List

Write a Review