Chip: EM4102, EM4200, TK4100, EM4305, EM4450, T5577, Mifare 1k S50 or Compatible with FM11RF08 Working frequency: 125KHz/13.56MHz Work mode: LF: Read-only; HF: R/W Induction distance: 2~10cm Inside serial number: 5 bytes Endurance: > 100,000 times Data retention: >10 years Size：43×30×5mm or 50×30×5mm, or customized Working temperature: -10℃~+70℃ Color options: yellow, blue, green, red, black, etc. Material: ABS shell, Ultrasonic Plastic …