Connected Alarm -50Pcs 125KHZ RFID Proximity ID Card Token Tags Access System Keychain Red Highlights Generic Brand 50Pcs 125KHZ RFID Proximity ID Card Token Tags Access System Keychain Red identity, come with 50 pieces High quality ABS material, water resistant and durable. With 5-10cm reading distance, fast and safe. By using EEPROM, you can retain data for more than 10 years. Each comes with key ring, easy to carry. specification: Material: ABS+metal Size (LxW): 34x27mm/1.34x1.06inch, thickness is 6mm/0.24inch Operating frequency: 125KHZ Reading distance: 5-10cm/1.97-3.94inch Package includes: 50 pieces ID key fobs Note: Each tag has been pre-programmed with a unique IDcannot be changed, which is printed on the back. Due to the manual measurement and lighting effects, there is a slight difference between the size and color of the above and the actual item.