---
product_id: 445239567
title: "ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm (Blank Card No Data)"
brand: "etekjoy"
price: "2667 som"
currency: KGS
in_stock: true
reviews_count: 9
category: "Etekjoy"
url: https://www.desertcart.kg/products/445239567-etekjoy-10-pcs-writable-125khz-rfid-sticker-coin-adhesive-back
store_origin: KG
region: Kyrgyzstan
---

# Waterproof & durable PVC casing 125kHz frequency for universal RFID compatibility Rewritable up to 100,000 times ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm (Blank Card No Data)

**Brand:** etekjoy
**Price:** 2667 som
**Availability:** ✅ In Stock

## Summary

> 🔐 Stick, program, and secure your world—upgrade your access game with ETEKJOY!

## Quick Answers

- **What is this?** ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm (Blank Card No Data) by etekjoy
- **How much does it cost?** 2667 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/445239567-etekjoy-10-pcs-writable-125khz-rfid-sticker-coin-adhesive-back)

## Best For

- etekjoy enthusiasts

## Why This Product

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

## Key Features

- • **Endless Reusability:** Erase and rewrite data up to 100,000 times—perfect for backups and custom tags.
- • **Compact & Adhesive Design:** 25mm coin-sized stickers with strong adhesive back to stick discreetly on your essentials (non-metal surfaces).
- • **Long-lasting Data Storage:** Reliable data retention for up to 10 years ensures your programmed info stays safe and accessible.
- • **Waterproof & Durable Build:** Crafted from tough PVC plastic to withstand daily wear and tear, rain or shine.
- • **Universal 125kHz RFID Compatibility:** Works seamlessly with ATMEL T5577 chip and common 125kHz standards like HID & EM4100.

## Overview

ETEKJOY’s 10-pack of 25mm writable 125kHz RFID sticker coins feature the versatile ATMEL T5577 chip, compatible with popular RFID standards like HID and EM4100. These rewritable tags can be programmed up to 100,000 times using a 125kHz RFID writer, offering a durable, waterproof PVC design with a strong adhesive back for easy attachment to non-metal surfaces. Ideal for professionals seeking customizable, compact access tokens that blend convenience with long-term reliability.

## Description

Important Note: 1. These are blank cards without pre-programmed card numbers. You cannot directly add them to RFID locks or use a card reader to read data from them. 2. Before use, you must first write data(card numbers) into them by a 125KHz RFID card writer. 3. Smart locks cannot write data to cards. They can read cards only. 4. These 125KHZ cards are ID cards. They are not IC cards or NFC cards. They don't work for TTLock or Tuya smart locks which use 13.56MHZ frequency.FAQ: 1. Question: Can I directly register these tags to my electronic lock? Answer: No. These tags are blank tags without pre-programmed card numbers. The electronic locks cannot write or program a blank tag. The electronic locks can read only. They read card numbers from programmed tags and then verify it Pass or not. 2. Question: Why can't I copy my old tags/cards to your tags by a card writer? Answer: First, make sure that your card is the same RFID frequency of 125KHZ. Not all RFID cards are 125KHZ type. For example, another popular key cards use the frequency of 13.56MHZ, which is also called NFC card or IC card. Cards of different frequencies are incompatible. Second, make sure that your RFID card writer can work for the frequency 125KHZ, and that you set it in the right channel. Some RFID card writers have several working frequencies.ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm Round-coin-shape sticker, with adhesive back. You can stick it on other stuff (but not metal) if necessary. Frequency: 125kHz; Chip: ATMEL T5577 (compatible with other universal 125kHz tags); Sensing Distance: 2.5 to 10 cm (1 to 4 inch); Data Storage Life: 10 Years. Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags. Approx Size: 25mm Diameter, 1mm Thickness. Casing Material: White PVC Plastic. Waterproof & Durable. Package includes 10 PCS.

Review: Work perfectly - Only one entrance to my building can be opened without a key fob, and I hate carrying it with me since my unit has a smart lock. My solution was to use a Flipper Zero (there's another review that said it doesn't work, but it definitely does) to clone the data from the fob and write it to one of these. I stuck it on the back of my phone with super glue (the adhesive works well but obviously wasn't designed to be used like this) and have been using it close to daily for about nine months and have never had an issue. Only slightly annoying thing (not the sticker's fault) is every time I hold my iPhone up to the reader to scan the sticker, the wallet app opens automatically—if you don't want that to happen, you need to disable express transit/payment in the settings app. Overall would highly recommend!
Review: Works well for HID or EM4100 standards - Update: I did notice one issue with this RFID (as well as with other types that are based on same T5577). It programs well and reads back correctly, identical to the original tag. However, in one office setting, I noticed that the programmed tag is recognized properly by all door readers, but not by the readers on the elevators. This is quite odd that Proxmark is not picking up the difference between the original and the programmed one. Somehow none of these tags were recognized by the elevator. Interestingly, I was able to find one type of tag that appears identical to how it handles the programming but also is recognized by both door and the elevator readers. Something to keep in mind that the programmed tags could have a small chance of compatibility issues. There are two common standards that I've seen around for doors/garages/offices in the 125kHz frequency: HID and EM4100. The first one has two identifiers facility code (fc) and a card number (cn). The second one is just one number. These cards can be programmed to emulate either of the standards. Programming these cards requires some kind of programming device. I had one old hand-held that can only read EM4100 and is easy to use: push the read button, scan a source card, push the write button and put it next to the writable card. Putting the Etekjoy cards for the writing process successfully duplicates the card and now you have two identical cards. Programming the HID standard (typically the cards that have "HID" embossed on them) requires a reader/writer that understands those, like Proxmark3. If you know the facility code and the card number, the command "lf hid clone -w H10301 --fc 123 --cn 12345" will program these Etekjoy cards and you have a duplicate that will read well in other readers. I really like the small size of the card and the fact that it has a adhesive back. It can be attached to the back of the phone inside a case, for example. The card is not flexible and you have to account for the 1mm width. The cards cannot be read without programming first. Each card being under a dollar is a great value.

## Features

- Important Note: These are blank cards without pre-programmed card numbers. You cannot directly add them to RFID locks or use a card reader to read them. Before use, you must first write data(card numbers) into them by a 125KHZ RFID card writer. They are not IC cards or NFC cards. They don't work for TTLock or Tuya smart locks which use 13.56MHZ frequency. More product info and FAQ is listed in the Product Description. Please read the description before purchase.
- Round-coin-shape sticker, with adhesive back. You can stick it on other stuff (but not metal) if necessary.
- Frequency: 125kHz; Chip: ATMEL T5577 (compatible with other universal 125kHz tags); Sensing Distance: 2.5 to 10 cm (1 to 4 inch); Data Storage Life: 10 Years.
- Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags.
- Approx Size: 25mm Diameter, 1mm Thickness. Casing Material: White PVC Plastic. Waterproof & Durable. Package includes 10 PCS.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B2DLRQ5T |
| Best Sellers Rank | #148 in Home Security Systems |
| Brand | ETEKJOY |
| Brand Name | ETEKJOY |
| Color | Multicolor |
| Customer Reviews | 4.3 out of 5 stars 285 Reviews |
| Finish Type | Uncoated |
| Item Shape | Round |
| Line Size | 1mm |
| Manufacturer | ETEKJOY |
| Manufacturer Part Number | ET929 |
| Material | Polyvinyl Chloride |
| Material Type | Polyvinyl Chloride |
| Model Number | ET929 |
| Number of Items | 10 |
| Number of Labels | 10 |
| Shape | Round |
| Size | 25mm |
| Unit Count | 10 Count |

## Product Details

- **Brand:** ETEKJOY
- **Color:** Multicolor
- **Finish Type:** Uncoated
- **Material:** Polyvinyl Chloride
- **Size:** 25mm

## Images

![ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm (Blank Card No Data) - Image 1](https://m.media-amazon.com/images/I/31KnQeA6E8L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Work perfectly
*by J***A on October 21, 2025*

Only one entrance to my building can be opened without a key fob, and I hate carrying it with me since my unit has a smart lock. My solution was to use a Flipper Zero (there's another review that said it doesn't work, but it definitely does) to clone the data from the fob and write it to one of these. I stuck it on the back of my phone with super glue (the adhesive works well but obviously wasn't designed to be used like this) and have been using it close to daily for about nine months and have never had an issue. Only slightly annoying thing (not the sticker's fault) is every time I hold my iPhone up to the reader to scan the sticker, the wallet app opens automatically—if you don't want that to happen, you need to disable express transit/payment in the settings app. Overall would highly recommend!

### ⭐⭐⭐⭐⭐ Works well for HID or EM4100 standards
*by A***A on December 14, 2025*

Update: I did notice one issue with this RFID (as well as with other types that are based on same T5577). It programs well and reads back correctly, identical to the original tag. However, in one office setting, I noticed that the programmed tag is recognized properly by all door readers, but not by the readers on the elevators. This is quite odd that Proxmark is not picking up the difference between the original and the programmed one. Somehow none of these tags were recognized by the elevator. Interestingly, I was able to find one type of tag that appears identical to how it handles the programming but also is recognized by both door and the elevator readers. Something to keep in mind that the programmed tags could have a small chance of compatibility issues. There are two common standards that I've seen around for doors/garages/offices in the 125kHz frequency: HID and EM4100. The first one has two identifiers facility code (fc) and a card number (cn). The second one is just one number. These cards can be programmed to emulate either of the standards. Programming these cards requires some kind of programming device. I had one old hand-held that can only read EM4100 and is easy to use: push the read button, scan a source card, push the write button and put it next to the writable card. Putting the Etekjoy cards for the writing process successfully duplicates the card and now you have two identical cards. Programming the HID standard (typically the cards that have "HID" embossed on them) requires a reader/writer that understands those, like Proxmark3. If you know the facility code and the card number, the command "lf hid clone -w H10301 --fc 123 --cn 12345" will program these Etekjoy cards and you have a duplicate that will read well in other readers. I really like the small size of the card and the fact that it has a adhesive back. It can be attached to the back of the phone inside a case, for example. The card is not flexible and you have to account for the 1mm width. The cards cannot be read without programming first. Each card being under a dollar is a great value.

### ⭐⭐⭐⭐⭐ Highly recommended
*by A***R on May 9, 2026*

Compatible for HID, Accurate description. Great product

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-10-03*