Tuya Wifi Smart Weather Station with Clock Indoor and Outdoor Temperature & Humidity Meter Multifunctional Large Screen Weather Clock Temp. & Humidity Gauge with 3 Sensors Auxiliary Machine Quantity: 1pcs / 3pcs (Optional) Material: ABS Input: 100-240V, 50/60Hz Output: 5V, 2A APP: Smart life/Tuya Wifi Standby Current: About 6uA for auxiliary machine Standby Time: 6 months for auxiliary machine Communication Way: Wifi(2.4G)+BLE module Communication Frequency for Auxiliary Machine: 433MHz Communication Distance for Auxiliary Machine: 80M (empty outdoor environment) Temperature Display Unit: ℃/℉ Humidity Display Unit: RH% Temperature Range & Accuracy: -20~60℃, ±0.5℃ Humidity Range & Accuracy: 0%~99%, ±2%RH Operating Temperature: -20~60℃ Auxiliary Machine Power Supply: 3V 1000mA, CR2477 button cell Main Machine Size: 160 * 23.5mm / 6.30 * 0.93in Auxiliary Machine: 45 * 15mm / 1.77 * 0.59in Item Weight: 355g / 12.52oz Package Weight: 720g / 25.40oz Package Size: 19.5 * 18.5 * 6.3cm / 7.68 * 7.28 * 2.48in