---
product_id: 57504311
title: "125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black)"
brand: "yarongtech"
price: "€ 21.76"
currency: EUR
in_stock: true
reviews_count: 13
category: "Yarongtech"
url: https://www.desertcart.hr/products/57504311-125khz-rfid-writable-rewritable-t5577-fob-tag-for-rfid-writer
store_origin: HR
region: Croatia
---

# 125kHz frequency for broad RFID compatibility Rewritable T5577 chip with 330-bit storage Pack of 10 durable black ABS keyfobs 125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black)

**Brand:** yarongtech
**Price:** € 21.76
**Availability:** ✅ In Stock

## Summary

> 🔐 Unlock endless possibilities with rewritable RFID power!

## Quick Answers

- **What is this?** 125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black) by yarongtech
- **How much does it cost?** € 21.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/57504311-125khz-rfid-writable-rewritable-t5577-fob-tag-for-rfid-writer)

## Best For

- yarongtech enthusiasts

## Why This Product

- Trusted yarongtech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Value Pack:** Get 10 high-quality rewritable fobs at under a dollar each—perfect for teams or backup security.
- • **Proven Reliability:** Consistent read/write performance with zero failures reported in real-world applications.
- • **Seamless Compatibility:** Supports common 125kHz formats like EM4100 and HID for versatile RFID projects.
- • **Durable & Discreet Design:** Sleek black ABS casing with sturdy keyring hole for everyday carry and professional use.
- • **Customizable Access Control:** Write and rewrite your own unique IDs with ease using the original ATMEL T5577 chip.

## Overview

This pack of 10 black RFID keyfobs features original ATMEL T5577 rewritable chips operating at 125kHz frequency, offering 330-bit storage capacity. Designed for use with compatible RFID writers, these durable ABS fobs support multiple common ID formats and provide reliable, customizable access control solutions ideal for professional and DIY security setups.

## Description

1. Material:ABS 2. Frequency: 125KHz 3. chip: Original ATMEL T5577 (The best rewritable chip) 4. Package included: 10pcs black T5577 RFID keyfobs 5. Working Mode: Read-write modes - Can be used in 125KHz RFID card Copier/ Duplicator 6. Storage Capacity: 330 bit (264 free bit availability) 7. Reading distance is 0 - 10cm Package include: 10pcs T5577 RFID rewritable 125khz writable Black Keyfobs. Please note it need to write the id on it before you read,it's original chip. can write in normal id format and H ID format WG26,If it can't work with your system,please contact with us first.we will give you a satisfying answer.

Review: 5/5 – Reliable, Easy-to-Use, and a Great Value - I've been really impressed with these T5577 rewritable RFID fobs. I picked up the 10-pack to use with a handheld RFID writer, and every single tag has worked flawlessly so far. I’ve used them in a few real-world scenarios: Made a backup fob to keep hidden in my truck just in case I lock myself out or misplace the original. Cloned a pet-sitter fob while I was on vacation so they could access my building without needing to hand over my main one. Copied a pool access fob for my friend group, so we can all get in without having to juggle the original back and forth. Cloning and rewriting have both worked without issue. I've tested re-writability multiple times on the same fob, and it’s held up perfectly each time—no failures, no weird behavior. The chips respond consistently, and I haven’t had a single dud in the pack. Heads-up for first-time users: These come blank, so you must have a compatible 125kHz RFID writer to program them. They won’t scan or read until they’re written to. That’s not a flaw—it’s just how the T5577 chip works. Also, don’t expect these to work with systems like Onity or Proxmark3 RDV4; they’re great for common 125kHz formats like EM4100 and HID. The fobs themselves are durable with a solid keyring hole, and the black color looks clean and low-profile. At under a dollar per fob, this is one of the best values I’ve found for RFID work. Highly recommended for DIY security backups, access sharing, and general RFID cloning projects.
Review: These work when used with a compatible reader! - These work great! I hate to say it, but I was pleasantly surprised

## Features

- Original T5577 Chips,it doesn't have pre-programmed id number,so need to write the id on it before you read,SO MAKE SURE YOU HAVE THE WRITER BEFORE YOU BUY IT.
- it's rewritable chip,and it can write in 125khz id format and H ID WG 125khz format
- Please note it can't be read before you program the chip
- can write by 125KHz RFID writer/copier,CAN NOT WORK WITH ONITY SYSTEM and Proxmark3 RDV4
- blue,black,yellow,red,Grey color available in our stock,if you want to customized logo,please contact with us.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079CL1KWR |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #108 in Home Security Systems |
| Color | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (809) |
| Date First Available | March 29, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.76 ounces |
| Item model number | 8595747712 |
| Manufacturer | YARONG |
| Material | Acrylonitrile Butadiene Styrene |
| Package Dimensions | 3.7 x 2.56 x 0.87 inches |
| Part Number | t57he-10 |
| Shape | Rectangular |

## Product Details

- **Brand:** YARONGTECH
- **Color:** Black
- **Material:** Acrylonitrile Butadiene Styrene
- **Number of Labels:** 10
- **Shape:** Rectangular

## Images

![125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black) - Image 1](https://m.media-amazon.com/images/I/61VttiyKDRL.jpg)

## Questions & Answers

**Q: do these work with an HID system? ( if the code is pulled form a proxcard2)**
A: YES,If you have HID writer,it can write in HID format.WG26.
Thanks.

**Q: Are they waterproof?**
A: yes,it's waterproof.

Thanks.

**Q: I have door key fob hid-125.  that's all i know.  will these work if i have hid-125 copier?**
A: It should

**Q: 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?**
A: 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5/5 – Reliable, Easy-to-Use, and a Great Value
*by R***B on July 31, 2025*

I've been really impressed with these T5577 rewritable RFID fobs. I picked up the 10-pack to use with a handheld RFID writer, and every single tag has worked flawlessly so far. I’ve used them in a few real-world scenarios: Made a backup fob to keep hidden in my truck just in case I lock myself out or misplace the original. Cloned a pet-sitter fob while I was on vacation so they could access my building without needing to hand over my main one. Copied a pool access fob for my friend group, so we can all get in without having to juggle the original back and forth. Cloning and rewriting have both worked without issue. I've tested re-writability multiple times on the same fob, and it’s held up perfectly each time—no failures, no weird behavior. The chips respond consistently, and I haven’t had a single dud in the pack. Heads-up for first-time users: These come blank, so you must have a compatible 125kHz RFID writer to program them. They won’t scan or read until they’re written to. That’s not a flaw—it’s just how the T5577 chip works. Also, don’t expect these to work with systems like Onity or Proxmark3 RDV4; they’re great for common 125kHz formats like EM4100 and HID. The fobs themselves are durable with a solid keyring hole, and the black color looks clean and low-profile. At under a dollar per fob, this is one of the best values I’ve found for RFID work. Highly recommended for DIY security backups, access sharing, and general RFID cloning projects.

### ⭐⭐⭐⭐⭐ These work when used with a compatible reader!
*by R***N on September 25, 2025*

These work great! I hate to say it, but I was pleasantly surprised

### ⭐⭐⭐⭐⭐ They work great with Flipper Zero
*by T***H on September 18, 2024*

I've tried a couple of brands of writable RFID key fobs and haven't had success. These worked perfectly. My flipper didn't read anything on them when I got them. Perfectly blank. When I wrote to it, it was a perfect copy. I can use my key fob instead of needing to pull my wallet out and take my ID out of my wallet.

## Frequently Bought Together

- 125khz RFID Writable rewritable T5577 fob tag for RFID Writer (Pack of 10) (Black)
- YARONGTECH-125khz writable rewrite blank white T5577 T5557 Plastic RFID hotel key card (Pack of 20)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-23*