RFID Card Reader Radio Frequency Automatic Identification Passive RFID Tag,No need battery,anti-collision protocaol. RFID Card Reader(1) Soft film basic level with ultra-thin tag, light, thin, small and suitable for various need of sealing types.(2) Passive, maintenance-free, the service life can reach more than 10 years, and can be erased and written again and again for over 100,000 times .(3) ...