spaander: EM4305 Frequency: 100~150KHz Protocol tandard: ISO11784, ISO11785, ISO FDX-B Work mode: R/W R/W distance: 2~10cm R/W time: 1-2ms Size: Φ20mm / 25mm / 30mm, thickness 1 ~ 4mm (of de aangewezen grootte ) Werktemperatuur: -20℃~+85℃ Erasable times: >100,000 times Data Storage: >10 years Materials and production process: PVC, shell inkapseling chips en spoel, ultrasonic welding International protection agreement: IP67/IP68 Weight: 1~ 4g