Powered by USB type C (5V). Please contact me if you have any questions. The item "LED Nixie Tube Clock Alarm please read description" is in sale since Wednesday, July 21, 2021.This item is in the category "Home & Garden\Home Décor\Clocks\Alarm Clocks & Clock Radios". The seller is "rc_bension" and is located in Hong Kong. This item can be shipped worldwide.