---
product_id: 600199639
title: "HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A"
brand: "henaxsad"
price: "€ 43.92"
currency: EUR
in_stock: true
reviews_count: 5
category: "Henaxsad"
url: https://www.desertcart.nl/products/600199639-hernas-20pcs-rewritable-uid-smart-key-fobs-premium-13-56mhz
store_origin: NL
region: Netherlands
---

# 13.56MHz high-frequency compatibility 20pcs rewritable UID fobs 100,000+ rewrite cycles HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A

**Brand:** henaxsad
**Price:** € 43.92
**Availability:** ✅ In Stock

## Summary

> 🔐 Unlock smarter security with every swipe!

## Quick Answers

- **What is this?** HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A by henaxsad
- **How much does it cost?** € 43.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/600199639-hernas-20pcs-rewritable-uid-smart-key-fobs-premium-13-56mhz)

## Best For

- henaxsad enthusiasts

## Why This Product

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

## Key Features

- • **Secure & Unique:** Each fob features a unique encrypted UID, ensuring top-tier security and easy duplication control.
- • **Endless Reusability:** Supports over 100,000 rewrites—clone, reprogram, and reuse without limits.
- • **Durable & Water Resistant:** Crafted from premium ABS plastic, built to withstand harsh environments and daily wear.
- • **Ready to Use Out of the Box:** Includes key rings and supports ISO 14443A protocol for instant deployment in professional settings.
- • **Ultimate Access Control Flexibility:** Fully compatible with all 13.56MHz RFID readers and door systems for seamless integration.

## Overview

The HERNAS 20pcs Rewritable UID Smart Key Fobs are premium 13.56MHz ABS RFID keys designed for professional-grade door access control. Fully compatible with MI-Fare Classic 1K systems and ISO 14443A standards, these fobs offer 1024 bytes memory across 16 sectors, support over 100,000 rewrites, and feature unique encrypted IDs. Durable, water-resistant, and ready to integrate with all major 13.56MHz readers, they are ideal for offices, hotels, campuses, and secure facilities seeking flexible, reusable, and secure access solutions.

## Description

Product Parameters Chip: UID changeable Material: High quality ABS plastic Operation frequency: 13.56MHz Support: Reading and writing, rewritable Compatible with all door entry system Reading distance: 0-10cm (Depending on the reader's design,environment and application) Working temperature: -40 °C~ 65 °C / -40℉~ 149℉ Read/write Times: 100000 times Size: 31 x 40 x 3 mm / 1.6 x 1.2 x 0.12 inch Package Including: 20 pcs blue UID keys Widely Used At: It applies to access control, hotel locks, elevator staff attendance and school campus access and payment control identification and security systems parking lot entry and payment, social security management transportation payment, municipal and ancillary service payment

Review: Compatible with Aqara locks - Theese work with Aqara locks
Review: Ends up UID is rewritable - If you are using the proxmark3 iceman fork, you need to use `hf mf cload` command to update the fob. `hf mf restore` was not able to update the UID.

## Features

- Fully compatible to MI-FARE Classic 1K,4-byte UID, 1024 bytes memory, organized in 16 sectors of 4 blocks, compliant to ISO/IEC 14443A protocal.
- Compatible with all kinds of 13.56MHz RFID readers writers and 13.56MHz door access control system devices.
- Support read, write and reprogrammed, over 100000 rewrite times. Can clone 13.56MHz IC card, NFC stickers, NOT compatible with 125KHz keys cards.
- Each key fob with a unique encrypted ID number, card data can be reprogrammed.
- High quality ABS plastic material, water resistant. Each fob comes with Key ring included.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | HENAXSAD |
| Color | Blue |
| Compatible Devices | 13.56MHz RFID readers, writers, and door access control systems |
| Connectivity Technology | Wireless |
| Item dimensions L x W x H | 1.6 x 1.2 x 0.12 inches |
| Power Source | Battery Powered |

## Product Details

- **Brand:** HENAXSAD
- **Color:** Blue
- **Power Source:** Battery Powered
- **Compatible Devices:** 13.56MHz RFID readers, writers, and door access control systems
- **Item dimensions L x W x H:** 1.6 x 1.2 x 0.12 inches

## Images

![HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A - Image 1](https://m.media-amazon.com/images/I/51vSdPJC3mL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Compatible with Aqara locks
*by P***L on August 17, 2025*

Theese work with Aqara locks

### ⭐⭐⭐⭐⭐ Ends up UID is rewritable
*by P***E on January 17, 2025*

If you are using the proxmark3 iceman fork, you need to use `hf mf cload` command to update the fob. `hf mf restore` was not able to update the UID.

### ⭐ Fob failed
*by F***K on April 12, 2025*

It didn’t work

## Frequently Bought Together

- HERNAS 20pcs Rewritable UID Smart Key Fobs, Premium 13.56MHz ABS Blank Keys for Door Access Control, Mi-Fare 1K S50 Copy Card NFC Tags Duplicate Keys, Block 0 Sector, Comply ISO 14443A
- LEXI 20pcs Changeable UID Smart Card Rewritable 13.56MHz RFID PVC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector
- LEXI Upgraded 10 Frequency RFID Writer/Reader/Duplicator, 125KHz 13.56MHz ID IC HID UID Decoder, Card Copier, NFC Reader, Key fob Cards Programmer, with USB Interface and Software

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**Shop now:** [https://www.desertcart.nl/products/600199639-hernas-20pcs-rewritable-uid-smart-key-fobs-premium-13-56mhz](https://www.desertcart.nl/products/600199639-hernas-20pcs-rewritable-uid-smart-key-fobs-premium-13-56mhz)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-22*