Name: LED digital clock Single weight: 233.6g Single size: 21.5*4.5*9.8cm Specifications: 1. [Time Setting]: Press and hold the mode for 3 seconds to enter the time setting. Set to hours and minutes. 2. [Alarm setting]: In the alarm mode, long press the mode key for 3 seconds to enter the time setting. Setting sequence: When setting the hour and minute sleep time, the light is "Al". When the alarm sounds: Press Mode to activate the sleep function. The Al icon will flash. Or tap to turn off the alarm. The Al icon will close. 3. [Night Mode]: In night mode, the watch will automatically dim the LED brightness level, double-tap the mode to enter night mode. 4. [Enable/Disable Night Mode by Mode]: After enabling the night mode, press mode to complete the night mode setting. Setting order: Hour Start Minute End Hour End Minute. 5. [Brightness level setting]: 3 brightness levels: bright, medium, dark, the default brightness level is medium. Click to switch brightness levels. Package Included:1*Clock1*USB cable