Module parameters: Power supply voltage: DC 3.3~15V Power supply current: 10~20mA Time display format: 24 hours Set the time, date, and automatic brightness function: In the normal display state, press and hold the setting key at the top for more than 1 second to enter the time adjustment function. When the hour starts to blink, short press the key to change the value. Long press the key to enter the minute adjustment; when minutes blink, short press the key to change the value. After setting minutes, long press the key to enter the second adjustment, then short press to return to zero. After adjustment, long press the key to enter the brightness adjustment function, where LL: 3 is displayed; short press the key to change the brightness level. Then long press the key to enter the automatic brightness function switch setting, where AL: x is displayed; short press the key to change the value. AL: 0 is off, AL: 1 is on. When AL: 1, the display will automatically change to level 1 brightness after 19:00 in the evening and automatically revert to the brightness value set in Ld after 7:00 in the morning. Finally, press and hold the key to save the settings and exit. Tips: The product may be updated across different batches. The actual product may have slight variations or color differences, which do not affect functionality. Material: Plastic Color: D-black background with white light Package Contents: 1 x Clock Only the above package content is included; other items are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.