Milesight IoT LoRaWAN Sensor Temp. & Humidity EM320-TH Magnet - 2 * 2700 mAh ER14505 Li-SOCL2 BatteriesNFC EnabledStore Locally 3000 Historical RecordsSupport Retransmission to Prevent Data LossMaterial: PC + ABS (Food-Grade)Temperature: -30°C ~ 60°CHumidity: 0% ~ 100% RH Ingress Protection: IP 67