1Notice:In order to drive the NIXIE tube, some internal equipments are under the High Voltage(upto ~180V DC),please do not use this clock outside or in any wet conditions, pleasedo not touch any part inside the clock when power supply is turned on. Always keepit away from kids.Specifications:Tube Name: IN-14(Made in the U.S.S.R.)Tube Diameter: 18mm;Tube Height: 55mm (approx including glass nipple);Digit Height: 17mm;Digit Width: 10mm;Clock Supply: 5V DC via USB;Max Current: ~650mA;Clock Size: 198mm(L)*56mm(W)*17mm(H)(~68mm(H)with IN-14 tube installed);PCB Size: 186mm*45mm;PCB Color: Black;Weight: 198g;The clock works with any standard USB supply,use only high-quality adapter!Features:1).5V USB powered, easy to be used. Can connect to your computer's USB plugs directly(* In some computers you may need to use the USB Cable that Have Two USB Connectorsat the End.).2).High efficiency HV circuit, you got almost no heat in 24*7 working condition;3).All SMT components, very thin PCB, only 8mm(max) high with the Top & Bottom components;Static driving, No Blue Dot, No Flashing, High Brightness;4).Support 12H or 24H display modes, can show "." as "A/P" in 012H time format. Leadingzero blanking is programmable.5).Display date in all format: YY.MM.DD or DD.MM.YY or MM.DD.YY or even MM.YY.DD;Can display week info too.6).Support 7 different Effects: Normal/ Fading/ Cross Fading/Slow Fading /Flash /Loop/Random Loop for displaying time. All the segments in the IN-14 tube can be lightedup, include the Left & right dots; Support 5 different dot effects.7).High accuracy RTC inside, factory calibrated to ± 5ppm, ±13 seconds (Max) per month.8).Simple setting by using 3 buttons only and supports IR remote control (optional).9).Three alarms with weekends ON/OFF support can be controlled individually.10).Three programmable Auto Power ON/OFF mode, can turn ON/OFF NIXIE tubes in anytime you want. This function can save tubes life.