Smart Alarm - 100 pcs 125KHZ RFID Proximity ID Card Token Tags Access System Keychains Green Highlights Generic brand 100 pcs 125KHZ RFID Proximity ID Card Token Tags Access System Keychains Green identity, comes with 100 pieces. High-quality ABS material, waterproof and durable. With 5-10cm read distance, fast and secure. Using EEPROM, it can retain data for more than 10 years. Each comes with a keychain, easy to carry. Specification: Material: ABS+metal Size(LxW): 34x27mm/1.34x1.06inch, thickness is 6mm/0.24inch Operating Frequency: 125KHZ Read Distance: 5-10cm/1.97-3.94inch Package Includes: 100 pieces ID Keychains Note: Each tag has been pre-programmed with a unique ID (cannot be changed), which is printed on the back. Due to manual measurement and lighting effects, there is a slight difference between the size and color of the above and the actual item.