「Dear customer friends, welcome to ForStrength, I wish you happy shopping, if you encounter any problems in the process of shopping please contact our customer service, thank you!」Features: EM4305 / T5577 chip 100% Brand New Weight: 65g (10pcs) Size:86 x 56 x 0.8mm Material: Plastic Operation frequency: 125Khz Read and rewrite key tags Detecting distance: 3-10cm Compatible with all Door Entry system Easy to carry Water resistant Can read and rewrite Each comes with Key ring included Compatible with all RFID reader to gain access No external power required. Brand new key inductive card for entrance guard system. It applies to access control, hotel locks, staff attendance and school campus access and payment control, identification and security systems, parking lot entry and payment, social security management, transportation payment, municipal and ancillary service payment Package includes: 10 x RFID EM4305 / T5577 Cards