LED time display: The default display of the clock is 0:00 when it is turned on Calendar display: The default display is 0:00 on January 1, 2023; the default date display format is M-D The LED time has three levels of brightness adjustment: high/ medium/ low/ off, the default is the brightest level The night light has three levels of brightness adjustment: high/ medium/ low/ off, the default is the brightest level 12/24-hour system: The 12-hour system and the 24-hour system can be switched, and the default is the 24-hour system Two sets of alarm clocks: AL1 is displayed as 6:00 when it is turned on by default, and AL2 is displayed as 13:00 when it is turned on by default Snooze function: 5 minutes by default, 5~60 minutes can be set Night mode: The default is OFF state, and the night mode is ON. The time automatically enters low brightness display from 18:00 to 6:00 the next day, and the night mode time can also be set manually Temperature display: temperature measurement range: -9.9℃ (14℉) ~ 60℃ (140℉) error: ±1°C, temperature unit can be switched to display: ℃/℉ Volume adjustment function: 01-03 three gears adjustable, default maximum gear USB output function: When using USB TYPE-C power cable for power supply, you can charge your mobile phone or other electronic devices through USB output Specifications: Three alarm sounds are optional: Bird sounds; Wave sounds; Piano sounds Screen size: 5.7 inches Body material: ABS Product size: 17*4.5*7.5cm Power supply: USB TYPE-C power cable power supply/3*AAA battery power supply (battery-powered backlight is not always on, battery not included)