Real time clock battery (CR1220) life around 3 years. Display battery (Li-ion 14500 3.7V, NOT AA 1.5V as you may think) life 6 hours of continuous glow or for a month if you use the watch only to look at the time for a few seconds as intended. Simple time setting using one button.Tubes are driven in high frequency dynamical indication and provide service for many years. All settings are stored in non-volatile memory. Charge: DC 5V and microUSB plug. Dimensions of the main boar : 75x55mm.
Dimensions of the strap: 300x80mm. Time accuracy (+/- 1 second per month) is provided by built-in RTC (Real Time Clock) based on extremely precise DS3231 module with temperature compensation and backup with CR1220 battery. Not AC frequency dependent works in all countries. Power cord and power supply are. The item "NIXIE VFD ERA WRIST WATCH CLOCK BASED ON IV-21 Date Temparature Display Seconds" is in sale since Friday, September 3, 2021.
This item is in the category "Home & Garden\Home Décor\Clocks\Alarm Clocks & Clock Radios". The seller is "ukrainian_gifts" and is located in Kyiv. This item can be shipped worldwide.