Specification: Name: Mi Temperature and Humidity Monitor 2 Model: LYWSD03MMC Item Use: Thermometer Hygrometer Materials: ABS & PMMA Operating Voltage: DC 2.5~3V Battery Type: CR2032 (not included) Wireless Connectivity: Bluetooth 4.2 Bluetooth Low Energy Frequency Range: 2402MHz-2480MHz Maximum Output Power: 4.16dBm Temperature Measurement Range: 0C to 60C Humidity Measurement Range: 0-99%RH Net Weight: 18g Item Dimension: 43x43x12.5 mm