--- product_id: 74292505 title: "125KHz T5577/EM4305 Writable RFID Keychains NFC Token tags Proximity ID Access Control Key Fob Card for Security Entry System Blue Color (10)" brand: "hfeng" price: "NT$656" currency: TWD in_stock: true reviews_count: 13 category: "H Feng" url: https://www.desertcart.tw/products/74292505-125khz-t5577-em4305-writable-rfid-keychains-nfc-token-tags-proximity store_origin: TW region: Taiwan --- # Waterproof ABS material Read & writable chip 125KHz secure frequency 125KHz T5577/EM4305 Writable RFID Keychains NFC Token tags Proximity ID Access Control Key Fob Card for Security Entry System Blue Color (10) **Brand:** hfeng **Price:** NT$656 **Availability:** ✅ In Stock ## Summary > 🔐 Unlock smarter security with style and substance! ## Quick Answers - **What is this?** 125KHz T5577/EM4305 Writable RFID Keychains NFC Token tags Proximity ID Access Control Key Fob Card for Security Entry System Blue Color (10) by hfeng - **How much does it cost?** NT$656 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/74292505-125khz-t5577-em4305-writable-rfid-keychains-nfc-token-tags-proximity) ## Best For - hfeng enthusiasts ## Why This Product - Trusted hfeng brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Value Pack:** Includes 10 vibrant blue keychains—perfect for outfitting your entire team or property with ease. - • **Fully Programmable:** Equipped with T5577/EM4305 chips that support both reading and writing for ultimate customization. - • **Durable & Waterproof:** Crafted from rugged ABS material with a metal keyring, built to withstand daily wear and weather. - • **Seamless Access Control:** 125KHz frequency ensures reliable proximity detection up to 10cm for smooth entry every time. - • **Versatile Compatibility:** Ideal for apartments, offices, parks, and more, integrating effortlessly with most 125KHz RFID readers. ## Overview This pack of 10 blue RFID keychains features durable, waterproof ABS construction and metal keyrings. Operating at 125KHz with T5577/EM4305 chips, they support both reading and writing, enabling flexible access control solutions for residential and commercial environments. Designed for proximity detection up to 10cm, these key fobs offer reliable, programmable security at an unbeatable value. ## Description 1. Material: ABS waterproof material 2. Colour: blue. 3. Support: Reading, and writable. 4. Working frequency: 125KHz 5. Chip: T5577 / EM4305 6: Quantity: 10 pieces Review: Cheap, simple to setup and works - They are key fobs. I had an old read write Chinese made machine easy to purchase. Wanted a couple of spares. Used 5 and all have worked. Saved me a total of £200. I purchased from another manufacturer and none of them worked. So incredibly happy. Next day delivery, cheap so worth a punt happy days🙂. Used alongside keys cut at Timmons. A problem solved in less than 48 hours. Review: Not compatible with Flipper zero - These do not perform in the same way as other T5577s I have bought. Not compatible with Flipper zero as it reads them as write only EM4100s. ## Features - 1. Material: ABS waterproof material. Each keyfob has metal keyring. - 2. Chip: T5577/EM4305 chip. Support: Read, and writable. - 3. Working Frequency:125KHz. Reading distance is 0-10cm. - 4. Widely used at apartment, office, park and other places. - 5. Each keyfob has metal keyring. Package included: 10 pcs keyfob. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07DYG5XL7 | | Alert Type | Proximity ID | | Antenna Location | access control in secure environments like apartments or offices | | Best Sellers Rank | 68,918 in DIY & Tools ( See Top 100 in DIY & Tools ) 104 in Home Alarm Systems | | Brand | HFeng | | Colour | Blue | | Compatible Devices | 125 kHz RFID Reader | | Compatible devices | 125 kHz RFID Reader | | Connectivity technology | Nfc | | Control Method | Touch | | Country of Origin | China | | Customer Reviews | 3.6 out of 5 stars 616 Reviews | | Included Components | 10 Pieces Keychains | | Installation method | Screw-In | | Item Dimensions | 6.5 x 1.8 x 9.5 centimetres | | Item Weight | 1 Grams | | Item dimensions L x W x H | 6.5 x 1.8 x 9.5 centimetres | | Manufacturer | HFeng | | Maximum Range | 10 Centimetres | | Model Number | T5577KEY | | Network Connectivity Technology | Nfc | | Part Number | HFeng | | Power source | With electric cable | | UPC | 634923544343 | | Unit Count | 10.0 count | ## Product Details - **Brand:** HFeng - **Colour:** Blue - **Compatible devices:** 125 kHz RFID Reader - **Item dimensions L x W x H:** 6.5 x 1.8 x 9.5 centimetres - **Power source:** With electric cable ## Images ![125KHz T5577/EM4305 Writable RFID Keychains NFC Token tags Proximity ID Access Control Key Fob Card for Security Entry System Blue Color (10) - Image 1](https://m.media-amazon.com/images/I/61x5iO8Rr+L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Cheap, simple to setup and works *by R***N on 16 June 2026* They are key fobs. I had an old read write Chinese made machine easy to purchase. Wanted a couple of spares. Used 5 and all have worked. Saved me a total of £200. I purchased from another manufacturer and none of them worked. So incredibly happy. Next day delivery, cheap so worth a punt happy days🙂. Used alongside keys cut at Timmons. A problem solved in less than 48 hours. ### ⭐ Not compatible with Flipper zero *by R**** on 7 November 2025* These do not perform in the same way as other T5577s I have bought. Not compatible with Flipper zero as it reads them as write only EM4100s. ### ⭐⭐⭐⭐⭐ Sadly these are now useless and not writable *by R***E on 27 January 2024* Avoid. These are not T5577 tags they are unwritable EM410x tags. Utterly useless. ## Frequently Bought Together - HFeng 125KHz T5577 / EM4305 Writable RFID Key Ring NFC Tags Token Proximity ID Access Control Key Fob Card for Security Entry System Blue (10) - YARONGTECH MIFARE Classic® 1K fobs 13.56MHZ ISO14443A Access Control Tags (pack of 10) --- ## 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.tw/products/74292505-125khz-t5577-em4305-writable-rfid-keychains-nfc-token-tags-proximity](https://www.desertcart.tw/products/74292505-125khz-t5577-em4305-writable-rfid-keychains-nfc-token-tags-proximity) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-09-12*