Function: 1. Sensitive: The RFID key fob has sensitive induction, and the door will open as soon as you get close to the sensing area, convenient and fast. 2. Features: small size, lightweight, easy to carry and store, enough RFID tags, so you no longer have to worry about losing or damaging. 3. Upgraded Design: Smart IC and thicker copper wire provide excellent using experience, professional manufacturing to meet your use needs. 4. Safe ABS: Environmentally friendly ABS material, safe and reliable, durable and resistant to falling, not easy to wear and deformation. 5. Usage: Waterproof RFID proximity keys are suitable for community access control, time and attendance and parking. Specification: Item Type: RFID Keychain Material: ABS Item Size: Approx: 25x35mm/0.98x1.37in Frequency: 125kHz Erase: Do not erase Package List: 100 xRFID keychains Note: 1. 2. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.