Main technical parametersCarrier frequency: 2.4GOperating frequency: 2400MHz~2500MHzAntenna: PCB unipolar antennaOutput power: -18dBm~7dBmReceiver sensitivity: -90dBmIdentification distance radius: 50~100m (depending on the antenna)Read/write time: 1msErase life: 100,000 timesWorking current: <5uABattery life: 3.0V battery, 12 monthsPower alarm: low battery alarm functionFunction: Step counting, expandable temperature measurement functionMaterial: TPU, PEOperating temperature: -20° C ~ + 60 ° C, wide temperature battery can be customized according to user needs, working range …