Feature:1. Tube clock support color backlight of 7 colors, which can keep bright and colorful lighting effects.2. Click SET button to enter the set time. Click Up, Down to set the time and then click Set to finish.3. And click up button to change, free to choose while seep module long press SET, no display, enter the sleep module (22:00~07:00 no display. 07:00~22:00 display). Display all 0 numbers and exit the sleep module.4. Set refresh time can be made by long press UP, and then click UP or Down. The refresh time can be set to 1‑9 minutes.5. For setting the background color, Click Down to change the color. When the color is refreshed, it means that the color will be changed automatically, change one color every day, or the color will be fixed.Spec:Item Type: Tube clockTime:1.7 colors (with led bottom background color instead of digital background color)2. Use timing ICSize: Approx. 187 x 48mm / 7.4 x 1.9inFunction: 24-hour display mode, refresh display every 5 minutes, no alarm.Set Time: Click SET button to enter the set time. Click Up, Down to set the time, and then click Set to finish.12/24 Hours Module: Click up button to change, free to chooseSleep module long press SET, no display, enter the sleep module (22:00~07:00 no display. 07:00~22:00 display). Display all 0 numbers and exit the sleep module.Set Refresh Time: Long press UP, and then click UP or Down. The refresh time can be set to 1-9 minutes,Set Background Color: Click Down to change the color. When the color is refreshed, it means that the color will be changed automatically (change one color every day), or the color will be fixed.Package List:1 x Tube Clock1 x Charging Cable