Note: This product does not include vacuum tubes, batteries and power supply, and only supports IN-12A and IN-12B Nixie tubes. It adopts Micro-USB power interface, so you can also use the 5V @ 1A charger for Android smartphones. Comes with 4 buttons for a very easy to use power switch and setup function. Hours/Minutes, Seconds/Date, Year/Month/DateTime formats can be changed between 12 hours or 24 hours. With the DS3231 real-time clock, built-in crystal oscillator, accurate timing, and backup battery socket (CR1220), it will continue to run time even when power off. Use Nixie tubing to extend the life of your tube with its non-toxic properties. You can also set the automatic detection time as needed. Stand function.

Additional information: External dimensions: (L) 5.7 inches (144 mm) x (W) 1.8 inches (45 mm) x (H) 1.5 inches (39 mm); Input voltage: 3.3 V - 5.5 V; Working current: Approx. 430 mA (@ 5 V); Glow tube anodized voltage: 170 V; Total power consumption: Approx. 2.1 W (@ x Manual (*English language not guaranteed).