do these work with an HID system? ( if the code is pulled form a proxcard2)

YES,If you have HID writer,it can write in HID format.WG26. Thanks.

Do these arrive blank or already set with a code number? Can I use them out of the box if I don’t have a tag writer?

No,this one is original chip,doesn't set with a code, if you want the tag already has a code,please see below: https://www.amazon.com/dp/B078HPJNF1

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125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black)

Product ID: 280744508

Details

Brand
YARONGTECH
Colour
Black
Finish type
Laminated
Material
Acrylonitrile
Size
Small

📡125kHz frequency for versatile RFID compatibility

🔄Rewritable T5577 chip for endless ID customization

🔑Pack of 10 black keyfobs for bulk convenience

$34.50

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔐 Unlock endless possibilities with every rewrite!

PRECISION READ RANGE - Reliable reading distance up to 10cm—ideal for quick, secure access without fumbling.
BULK READY CONVENIENCE - Get 10 sleek black keyfobs in one pack—perfect for teams, offices, or tech-savvy pros.
SEAMLESS COMPATIBILITY - Supports standard 125kHz and H ID WG26 formats, ensuring smooth integration with most RFID readers.
COMPACT DURABLE DESIGN - Crafted from sturdy ABS with a laminated finish, these keyfobs withstand daily wear while staying lightweight.
ULTIMATE RFID FLEXIBILITY - Write and rewrite IDs effortlessly with the original ATMEL T5577 chip, tailored for 125kHz systems.

The YARONGTECH 125kHz RFID Writable T5577 keyfob pack offers 10 durable, rewritable black tags featuring the original ATMEL T5577 chip. Designed for seamless writing and rewriting of IDs in multiple 125kHz formats, these compact ABS keyfobs provide reliable read ranges up to 10cm, making them perfect for professional environments requiring flexible, secure access control solutions.

Specifications

ASIN	B079CL1KWR
Best Sellers Rank	#423,380 in Fashion ( See Top 100 in Fashion ) #1,109 in Luggage Tags
Brand Name	YARONGTECH
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (674)
Finish Type	Laminated
Item Shape	Rectangular
Item Weight	0.11 Pounds
Manufacturer	YARONG
Manufacturer Part Number	t57he-10
Material Type	Acrylonitrile Butadiene Styrene
Model Number	8595747712
Number of Items	10
Number of Labels	10
Size	Small
UPC	725350792459
Unit Count	10 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$34.50

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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