This is the newest design USB powered IN-18 6-tube clock with glass tube middle dots,all plug-able design.
All the NIXIE tubes and the middle dots can be replaced by hand directly via the electroic socket pins.
Usb Powered,high efficiency power module,up to 90%,when under 5V,all 6 tubes in the highest brightness and with all LEDs on,the current is about <=1A only!!!
8-level global brightness with no blue dot.