Feature:1. It can be powered by a mobile phone charger and the interface is MicroUSB.2. Equipped with acrylic transparent case, DIY on the exterior, making the clock more beautiful.3. It has 4 keys, namely the menu key, adjustment + key, adjustmentkey, and on / off key.4. The sevencolor light can be adjusted to make the clock more cool and stylish.5. Exquisite workmanship, unique and personalized appearance, small and light.Specification:Item Type: ClockVoltage: DC 5VCurrent: 1A or HigherShell Material: AcrylicLighting: Seven-Color Lighting (Adjustable)Use: Clock.Package List:1 x Clock 1 x USB Charging CableNote:Comes with a button battery CR1220.4 tubes are not equipped and need to be purchased separately.The nixie tube model is IN-12B, other nixie tubes are not supported.