NIXIE TUBE CLOCK with blue becklight KIT The package includes:1. Two boards2. All components for assembly3. Four IN-12 nixie tubes4. Assembly diagram Clock are made on IN-12backlight can be switched off by removing the jumperClock display: time, date, temperatureFour modes of operation (01, 02, 03, 04)mode – 01 (displays only the time)mode – 02 (alternately displayed time and date)mode – 03 (alternately displayed time and temperature)mode – 04 (alternately displays the time, date, temperature)Modes are switched by pressing short button 3to set the time, date – hold button 3supply: standard 12V / 0.5A, (1A or more) DC (Power supply not included) central pin-positive 2.1*5.5 connector Battery backed-up, DS1307 RTC (real time clock) will stay right on time, set the time once and forget it If you have any questions happy to answer All you need to do is solder all parts and you get a clock such as in the photo. Fast delivery by airmail Video: https://www.youtube.com/watch?v=PeGepy7glg4&t=32s