---
product_id: 524227018
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: "€ 25.16"
currency: EUR
in_stock: true
reviews_count: 5
category: "Etekjoy"
url: https://www.desertcart.es/products/524227018-etekjoy-10-pcs-writable-125khz-rfid-sticker-coin-adhesive-back
store_origin: ES
region: Spain
---

# Waterproof & durable PVC casing 125kHz universal RFID frequency 100,000 rewrites guaranteed 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:** € 25.16
**Availability:** ✅ In Stock

## Summary

> 🔐 Stick, program, and secure your world—because your access should be as smart as you are.

## 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?** € 25.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/524227018-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 Rewritability:** Erase and rewrite data up to 100,000 times—perfect for evolving security needs.
- • **Compact Adhesive Design:** 25mm coin-sized sticker with adhesive back to discreetly tag almost anything (non-metal surfaces).
- • **Long-Lasting Data Storage:** Reliable data retention for up to 10 years ensures your tags stay valid and secure.
- • **Waterproof & Durable Build:** Rugged PVC casing withstands daily wear and moisture, built for real-world use.
- • **Universal 125kHz Compatibility:** Seamlessly programs with most 125kHz RFID systems for ultimate flexibility.

## Overview

The ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Tags are versatile, rewritable proximity ID tokens featuring ATMEL T5577 chips. Each 25mm round sticker is waterproof, durable, and designed for up to 100,000 rewrites with a 10-year data retention lifespan. Ideal for professionals needing customizable, adhesive RFID tags compatible with universal 125kHz systems, these blank cards require a compatible RFID writer to program and cannot be used with 13.56MHz smart locks.

## 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: 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.
Review: No problem programing the RFID chips for HID-125 Hz protocol. Read test speeds were much faster than I was expecting. I won’t hesitate to buy more of these.

## 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 | #51,952 in Office Products ( See Top 100 in Office Products ) #144 in Tags & Tickets |
| Brand | ETEKJOY |
| Color | Multicolor |
| Customer Reviews | 4.4 4.4 out of 5 stars (247) |
| Date First Available | 14 April 2023 |
| Item Weight | 9 g |
| Line Size | 1mm |
| Manufacturer | ETEKJOY |
| Manufacturer Part Number | ET929 |
| Material Type | Polyvinyl Chloride |
| Model number | ET929 |
| Number of Items | 10 |
| Package Dimensions | 11.2 x 8.51 x 0.71 cm; 9 g |
| Shape | Round |
| Size | 25mm |

## Product Details

- **Brand:** ETEKJOY
- **Colour:** Multicolor
- **Finish type:** Polished
- **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

### ⭐⭐⭐⭐⭐ Review
*by A***A on 14 December 2025*

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.

### ⭐⭐⭐⭐⭐ Review
*by D***N on 7 December 2025*

No problem programing the RFID chips for HID-125 Hz protocol. Read test speeds were much faster than I was expecting. I won’t hesitate to buy more of these.

### ⭐⭐⭐⭐⭐ Review
*by W***? on 20 January 2025*

Got these rfid tags when I needed some stickers instead of keychain pieces, and these worked great. My only issue is that they stand out on my black phone case, but that's on me. They are plasticy on the outside, similar to a dry-erase board, so you can't color them in with a sharpie. The adhesive is great, it's held up quite well since I stuck one on my phone case a few months ago. And it hasn't not worked once. Super convenient when my phone's easier to reach than my wallet when my hands are full.

## Frequently Bought Together

- ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm
- 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)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.es/products/524227018-etekjoy-10-pcs-writable-125khz-rfid-sticker-coin-adhesive-back](https://www.desertcart.es/products/524227018-etekjoy-10-pcs-writable-125khz-rfid-sticker-coin-adhesive-back)

---

*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-18*