Each time you connect your phone via Bluetooth, the time is automatically synchronized, and you can easily set the time. You can set up to 16 alarm groups, and each alarm can be configured with a snooze function, making it simple to use. Choose from 8 different ringtones. The device provides real-time monitoring of indoor temperature and humidity with high accuracy. It works with other compatible smart devices to enable automatic adjustment of indoor conditions. For example, if the temperature drops below 20°C, the heater can be triggered automatically. Backlight brightness can be adjusted for different times of day, and the backlight duration is customizable, ranging from off to 30 seconds. Tap the device to turn on 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 App Compatibility: Compatible with Mijia app (supports temperature and humidity integration with other devices) Custom Alarm Repeat: Yes Snooze Function: Yes Backlight Duration Adjustment: Yes Backlight Brightness Adjustment: Yes Alarm Volume Adjustment: Yes Alarm Ringtone Selection: Yes