Feature: 1. [Nixie Tube Clock Circuit Board] Make your own Nixie tube clock with this module, creating a captivating digital timepiece that adds unique charm to any room. 2. [Accurate Timekeeping] The circuit board features high performance clock chip, ensuring accurate time with less than one minute error per year. 3. [Easy Time Setting] Simply click Set and adjust with Up and Down keys to easily set the time, suitable for users of all ages. 4. [Multi Functions] This circuit board allows you to change between 12 or 24 hour formats, and choose to activate or disable sleep mode. 5. [Multi Backlit Colors] The Nixie glow clock circuit board allows you to set refresh time and customize the backlit color, enhancing the aesthetic appeal of your unique timepiece. Specification: Item Type: Nixie Tube Clock Circuit Board Material: PCB Input Voltage: 5V 2A Battery: CR927 button cell x 1 (not included) Function: 1. Time 2. Backlit Color (multiple colors switching) 3. 12/24 hour module 4. Sleep Module (no display from 22:00 to 07:59. Display from 08:00 to 21:59), can be set to enable or disable 5. Refresh time setting (1~9 minutes), automatic save setting Setting: 1. Set Time: Click Set key to enter setting time. Click Up or Down to set time, then click Set to complete 2. 12/24 Hour Module: Click Up key to change 3. Sleep Module: Long click Set, no display, enter sleep mode (no display from 22:00 to 07:00. Display from 07:00 to 22:00). Display 0 for all digits outside sleep mode 4. Set Refresh Time: Long click Up, then click Up or Down. Refresh can be set 1~9 minutes (click Set to change 1-5 LEDs brightness) 5. Set Backlit Color: Click Down to change color. Color change means it will automatically change color (change one color every day) or fix color. Package List: 1 x Nixie Tube Clock Circuit Board Note: Without battery and tube.