10-Pack T5577 125kHz Rewritable RFID Key Fobs & Tags
10-Pack T5577 125kHz Rewritable RFID Key Fobs & Tags
10-Pack T5577 125kHz Rewritable RFID Key Fobs
Upgrade your access control setup with this convenient 10-pack of T5577 rewritable RFID key fobs. Operating at 125kHz, these compact and durable key tags are compatible with the vast majority of 125kHz RFID readers — making them ideal for offices, apartments, hotels, schools, parking systems, and more. Each fob comes with a built-in key ring for effortless everyday carry.
Made in China.
Key Features
- Universal 125kHz Compatibility: Works seamlessly with standard 125kHz RFID access control readers — both read and write capable.
- Rewritable Over 100,000 Times: The T5577 chip (EM4305 or EM5200, sent randomly) supports unlimited overwrites with a lifespan exceeding 100,000 write cycles.
- Secure 8-Digit Password Protection: 330-bit memory capacity across 10 partitions, protected by an 8-digit password for added security.
- Durable ABS Construction: Waterproof, fade-resistant, and built to last — no external power required for operation.
- Customizable Surface: Surface can be engraved, sprayed, or printed with serial numbers, letters, or logos.
- Key Ring Included: Each fob comes with a key ring for convenient attachment to any keychain.
- Wide Read/Write Range: Effective operating distance of 3–10 cm (1.18–3.94 in).
Specifications
| Material | ABS |
| Chip Model | T5577 (EM4305 or EM5200 — sent randomly) |
| Working Frequency | 125kHz |
| Memory Capacity | 330 Bits, 10 Partitions, 8-Digit Password |
| Read/Write Distance | 3–10 cm (1.18–3.94 in) |
| Write Cycle Life | 100,000+ times |
| Quantity | 10 pcs per lot |
| Country of Origin | Made in China |
Common Applications
- Office and building access control systems
- Hotel door lock management
- Employee attendance and time tracking
- School campus access and payment systems
- Parking entry and vehicle management
- Identification and security systems
- Social security and identity management solutions
Please note: Due to variations in photography lighting and monitor settings, the actual product color may appear slightly different from the images shown.
For more information on RFID technology and its applications in electronic access control, visit the NIST Guidelines for Securing RFID Systems.
Frequently Asked Questions
Q: What RFID readers are compatible with the T5577 125kHz key fobs?
A: These T5577 rewritable key fobs are compatible with the vast majority of standard 125kHz RFID access control readers and duplicators. They work with popular systems used in offices, apartment buildings, hotels, parking facilities, and schools. Always verify your existing reader operates at 125kHz before purchasing.
Q: Can I overwrite the data on these RFID key fobs multiple times?
A: Yes — the T5577 chip is fully rewritable and supports over 100,000 write/erase cycles. This makes these fobs extremely versatile for access control systems where credentials may need to be updated or reassigned regularly.
Q: What chip will I receive — EM4305 or EM5200?
A: Both the EM4305 and EM5200 chips are functionally compatible with T5577 applications and 125kHz systems. The specific chip variant is sent randomly, as both perform equivalently for standard 125kHz RFID read/write use cases.
Q: Are these RFID key fobs waterproof?
A: Yes. The fobs are made from durable ABS plastic, making them waterproof and resistant to fading — suitable for everyday carry in various environments, including outdoor use.