chip: TK4100/TK4101, fully compatible with EM4102 Working frequency: 125KHz Working pattern: Read-only Induction distance: 2~10cm Internal serial number: 5 bytes Size: 85.5× 54 × 1.80mm (ak yon twou pòtab) R / W ranje: 2~ 10cm, depending on the reader and the application environment Working temperature: -20℃ ~ + 80 ℃ (-4℉ ~ + 176 ℉) materyèl: ABS Wipe times: >100,000 fwa Depo done: 10 ane