Each time you connect your phone via Bluetooth, the time is automatically synchronized, allowing for easy time setting. You can set up to 16 alarm groups, with each alarm group supporting a snooze function for added convenience. Choose from 8 available ringtones. The device provides real-time monitoring of indoor temperature and humidity with high accuracy. It works with other compatible smart home devices to enable automatic adjustment of indoor conditions. For example, if the temperature drops below 20°C, the heater can be automatically activated. Backlight brightness is adjustable for different times of day, and backlight duration can be set from off to 30 seconds. Tap the device to activate the backlight and clearly view the time at night. Specifications: Material: Plastic Weight: 106g Dimensions: 80.3 x 41 x 83 mm Screen Size: 61 x 61 mm Temperature Range: -9.9°C to 49.9°C Humidity Range: 0% to 99.9% Power: 2 x AA batteries (not included) Number of Alarms: 16 Temperature Display: Yes Humidity Display: Yes Bluetooth Version: 5.0 Compatible App: Mijia App (supports temperature and humidity联动 with other devices) Custom Alarm Repeat Mode: Supported Snooze Function: Supported Backlight Duration Adjustment: Supported Backlight Brightness Adjustment: Supported Alarm Volume Adjustment: Supported Alarm Ringtone Selection: Supported