Instant conversation starter! Warm up your office, bedroom, or living room with this classic Nixie IN 12 four tube clock. Inspired by mid-century modern design, the case is made from either maple or walnut hardwood with a contrasting clock face. Modern electronics power these retro warm amber bulbs which are easily replaceable without soldering or wiring. Wall adapter included! An amber backlight can be turned on/off for additional light. These Nixie tubes are new old stock and at least 30 years old from the former Soviet Union! Clock specifications: Amber IN 12 Nixie tubes (instructions included) 100 - 240 AC (US wall adapter plug included) Amber/yellow backlight 12 or 24 hours Built-in cathode poisoning prevention Backup battery included Tubes easily replaceable The clock case is created from solid maple or walnut wood. Additional vent holes are placed on the back face to prevent overheating.