Unique and elegant IV-18 VFD tube whose substrate and pipe body are transparent. It has suspended production in 20th century, just one tube can show many numbers at the same time, can warm your desk/office/studio. Multiple settings can be adjusted through WIFI configuration page, supporting free time zone settings, 12/24 hour system, with alarm clock, stopwatch, timer on/off function, etc., with diverse functions and convenient use. Support custom numbers and 2 digital display modes, set RGB backlight color and 2 lighting effects, and even adjust brightness levels 0-8, allowing you to DIY your own desktop clock. Powered by USB 5V, very easy and convenient to use no matter when and where you are. It can bring you strong vintage feelings just back to last century, perfectly match with a v.