100-Pack 125kHz TK4100 RFID Key Fobs – Access Control Tags
100-Pack 125kHz TK4100 RFID Key Fobs – Access Control Tags
100-Pack 125kHz RFID Key Fobs — TK4100 Proximity Access Control Tags
Secure, reliable, and ready to use right out of the box — this bulk pack of 100 RFID key fobs is the perfect solution for offices, apartment buildings, parking facilities, schools, hotels, and any access control environment that runs on a 125kHz RFID system. Each fob comes pre-programmed with a unique laser-printed ID, so there's zero setup required.
⚠️ Important: These are read-only tags (TK4100 chip). They cannot be rewritten or re-encoded. If you need a rewritable fob, please look for T5577-based options in our store.
Key Features
- Chip: TK4100 — industry-standard 125kHz read-only proximity chip
- Frequency: 125kHz — universally compatible with most RFID door entry readers
- Read Range: 3–10 cm (depending on reader sensitivity)
- Material: Durable ABS plastic — lightweight and long-lasting
- Operating Temperature: -40°C to 85°C — suitable for indoor and outdoor use
- Water Resistant: Handles everyday moisture and weather exposure
- Key Ring Included: Every fob comes with an attached key ring for easy carry
- Unique ID: Each token is pre-programmed with a unique ID, laser printed on the fob
- Quantity: 100 fobs per lot — ideal for bulk deployments
Applications
- Door access control systems (offices, apartments, gyms, schools)
- Hotel room locks and guest management
- Staff attendance and time-tracking systems
- Parking lot entry and payment systems
- Public transportation ticketing
- Campus access and security management
- Municipal and social service ID systems
Specifications at a Glance
| Brand | LUCKING DOOR |
| Model | N03 ID Tag Keychain |
| Chip | TK4100 |
| Card Type | Read-Only (not rewritable) |
| Frequency | 125 kHz |
| Material | ABS Plastic |
| Quantity | 100 pcs/lot |
| Operating Temp | -40°C to 85°C |
| Water Resistance | Yes |
| Country of Origin | Made in China |
For more information on RFID technology and electronic security standards, visit the NIST Guidelines for Securing RFID Systems.
Frequently Asked Questions
Q: Are these 125kHz RFID key fobs compatible with my existing access control reader?
A: Yes — these TK4100 125kHz RFID key fobs are compatible with the vast majority of standard 125kHz RFID access control readers, including popular brands used in offices, apartments, hotels, and parking facilities. Always verify your reader supports 125kHz EM/TK4100 format before purchasing.
Q: Can I rewrite or re-program these RFID key fobs?
A: No. These are read-only TK4100 chips. Each fob ships pre-programmed with a fixed, unique ID that cannot be changed or overwritten. If you need a rewritable fob, look for T5577-based key fobs instead.
Q: Are the RFID fobs waterproof and suitable for outdoor use?
A: These fobs are water resistant and rated for operating temperatures from -40°C to 85°C, making them suitable for both indoor and light outdoor environments. They are not designed for full submersion.
Q: What is the read range of these 125kHz key fobs?
A: The typical read range is 3–10 cm, depending on the sensitivity and power of your RFID reader. This is standard for proximity-style 125kHz tokens.