1, input: Micro-USB 5V 1A;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: function: 24 hour mode, time display, anti poisoning program (every 10 minutes refresh the monitor), no alarm, remote control is not supported IN14 Nixie Clock User Manual Function: Colors back light(7 colors) Sleep module(22:00~07:00 no display. 07:00~22:00 display) Refresh time setting(1~9 minutes) 3,Opertate: 3.1.Set Time: Click "SET" key into setting time. Click "Up","Down" to set time, and click "Set" to finish. 12/24 hour module: Click "Up" key to change Sleep module. Click "SET"long, while no display , into sleep module(22:00~07:00 no display. 07:00~22:00 display). Display all "0"number,out of sleep module. Set refresh time: Click "UP" long, and click "UP"or "Down". refresh can be set 1~9 minutes, Set back color: Click "Down" to change color. when color refresh that means it is into change color automatic (every day change one color),or color is fixed. Manufacturing requirements: Tubes white pin need to PCB white pin. colour: blue Material: metal +pc size: about 187x48mm Package Contents: 2 x circuit board 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.