1. input: 11V ~ 13V, 1A, DC power (5.5-2.1)2. Using STM8S005 as the main control, built-in procedures, welding light tube can be used directly.3. Support seven color display clock (containing RGB lamp).4. the use of imported high-precision clock chip, one year less than 1 minutes error5. Using integrated IC unit program, the screen is more stable and reliablefunction: 24 hour mode, display time, anti program poisoning (every 10 minutes to cool the monitor), no alarm, remote control is not supported, No time switch machineOpertation:From Set time: click on "SET" key for seting time. lick "Up", "Down" to set the time, and click "Set" to finish.Black light color set: Click "Up" in color adjustment mode (each day changes color). Click "Down" in a fixed color.colour: blue + transparent/blue + blackMaterial: Plasticsize: 187x48mmPackage Contents:1 x Circuit board that has been soldered and debugged (No shine)1 x Transparent Case/1 x Circuit board that has been soldered and debugged (No shine)1 x black CaseOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.