100-Pack 125KHz RFID EM4100 Waterproof Key Fob Keychains
100-Pack 125KHz RFID EM4100 Waterproof Key Fob Keychains
100-Pack Waterproof RFID 125KHz EM4100/TK4100 Key Fob Keychains
Keep access control simple and organized with this bulk pack of 100 colorful RFID key fob keychains. Each fob is pre-programmed with a unique, read-only ID — making them ideal for building access systems, gym memberships, parking facilities, time-attendance systems, and any other 125KHz RFID-compatible setup. No two fobs share the same code, so you can assign and track each one with confidence.
Made in Mainland China.
Why Choose These RFID Key Fobs?
- Waterproof & Durable Shell: The housing is crafted from high-grade, anti-corrosion and heat-resistant material. The RF chip is fully sealed inside with epoxy resin and ultrasonically welded for a rugged, long-lasting build.
- Read-Only & Unique IDs: Every fob carries a factory-set, non-repeatable unique ID — impossible to accidentally overwrite, ensuring reliable, tamper-resistant identification.
- Fast & Reliable Scanning: With a reading speed of just 1–2ms and a read range of 1–5cm, these fobs are optimized for quick, seamless access-point use.
- Wide Operating Temperature Range: Performs flawlessly from -20°C to 85°C (-4°F to 185°F), suitable for indoor and outdoor installations.
- Long Service Life: Rated for over 100,000 read cycles, these fobs are built to handle years of daily use.
- Multi-Color Variety: Comes in assorted colors, making it easy to color-code groups, departments, or access levels at a glance.
- CE Certified: Meets CE certification standards for safety and performance.
Technical Specifications
- Chip: TK4100 / EM4100
- Frequency: 125KHz (Low Frequency)
- Working Type: Read-Only
- Reading Distance: 1–5 cm
- Reading Speed: 1–2 ms
- Operating Temperature: -20°C to 85°C
- Endurance: >100,000 reads
- Certification: CE
- Quantity: 100 pieces per pack
Common Applications
- Building & office access control
- Gym, club & membership management
- Time & attendance tracking systems
- Parking lot access
- Employee ID & visitor management
- School & campus security systems
Package Contents
- 100 × RFID 125KHz Read-Only Key Fob Keychains (Assorted Colors)
For more information on RFID technology standards and security best practices, 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 — as long as your reader supports the 125KHz low-frequency standard with EM4100 or TK4100 chip formats, these key fobs will work seamlessly. This is one of the most widely used RFID standards for access control systems worldwide.
Q: Can the ID code on these key fobs be changed or reprogrammed?
A: No. These are read-only fobs, meaning the unique ID is permanently factory-set and cannot be overwritten or reprogrammed. This makes them highly secure and tamper-resistant for access control applications.
Q: Are these key fobs waterproof and suitable for outdoor use?
A: Yes. Each fob is encased in an anti-corrosion, high-temperature-resistant shell with the RF chip sealed in epoxy resin and ultrasonically welded. They are waterproof and rated to operate in temperatures from -20°C to 85°C, making them suitable for both indoor and outdoor environments.
Q: How many fobs come in a pack, and do they all have different ID codes?
A: Each pack includes 100 key fob keychains in assorted colors. Every single fob has a unique, non-repeating ID code — no two fobs in the pack are the same, making individual identification and tracking straightforward.