Wifi BluetoothTemperature And Humidity Sensor IndoorAPP Remote Control:Monitor indoor climate from afar with the Tuya Smart APP, ensuring your home's comfort is always at hand. High Temperature and Low Temperature Alarm:Stay informed with real-time alerts on your phone when the set temperature is exceeded or falls below the threshold. Battery Efficiency:Enjoy long-lasting performance with a low power consumption design, averaging 3-4 months on a single set of AAA batteries. WiFi frequency: 2.4GHZ IEEE 802.11b /g Temperature measurement range: -20°C to 60°C Humidity measurement range: 0%RH to 100%RH Temperature measurement accuracy: ±1°C Humidity measurement accuracy: ±5%RH Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.