... 4,Always ready for action Product's NameGPS 3G Reader with Active RFID TransponderDescription Active RFID Tag1, Each Tag with unique ID number2 ... 2 years3, Maximum reading range can reach to 80m3, High-security, long-range, bi-directional4, Powerful anti-jamming capability5 ... hesitate, we welcome customization products, Lood forwared for your inquiry. Thank you !! GPS 3G Reader with Active RFID Tag