This is assembled the IN-12A in-12B Nixie Tubes ClockPower: 5V/0.3A, (5V adapter, or USB from PC, or powerbank - not included)Hours, minutes, 24 time displayTubes are tested and comes from NOS (included) Built-in battery socket, time backup during power interruptions (battery CR 1220 3V, not included)Remote control (battery CR 2032 - not included). RGB backlight 9 colors, multi-coloredWatch size ~ 4.4 * 1.42 * 1.77 inches.