Introduce: 1. Input: 11V~13V, 1A, DC power (5.5-2.1) 2. Using STM8S005 as the main control, built-in procedures, welding light pipe can be used directly. 3. Support seven clock color display (containing RGB lamp). 4. The use of high-precision clock chip, a year less than 1 minutes error 5. Using integrated IC drive program, the display is more stable and reliable 6. Size: 187x48mm, 7. Function: 24 hour mode, time display, anti poisoning program (every 10 minutes refresh the monitor), no alarm, remote control is not supported, No time switch machine Opertation: Set Time: click "SET" key into seting time.lick "Up", "Down"to set time, and click "Set" to finish. Set black light color: Click "Up" into color tuning mode (every day change color). click "Down" into fixed color. Color: Blue Material: plastic Package Contents: 2 xDIY Nixie Tube Clock Module Only the above package content, other products are not included. Note: Light reflection 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.