RFID MICROCHIP SYRINGE BIOGLASS TAGS RF Interface:ISO 11784/11785 Transmission: Full Duplex (FDX-B) Microchip: EM4305 , R/W, 134.2 + 2 KHz / 125KHz, 256bits Dimension: 1.25 X 7mm / 1.4 X 8mm / 2.12 X 8mm / 2.12 X 12mm /3 X 15mm / 4 X 32mmOperating: -25C to 70C, Storage: -40C to 100C Weight: 0.1g Memory: > 20 years Material: Cylindrical Bioglass Power: No Battery Required Application:Cats. Dogs. Cows. Fish, birds, even Human beings, Singal: No known blockage by non-magnetic materia