Glow tube models are IN-12B, and other glow tubes are not supported. Power Specification: Voltage DC 5V, current 1A or more. Power can be supplied by using mobile phone charger and the interface is MicroUSB.
There are two versions to choose from: the ordinary version and the RGB backlight version. See the picture below for the difference between the two effects.
The only difference between the two versions is that one has an LED backlight and the other has not. There are four keys without remote control.