Incorporated battery for maintaining timekeeping during power outage. 4 user programmable brightness levels (including 0 for tubes off). 12 / 24 hour format. Date format dd:mm:yy or mm:dd:yy (user selection).Stabilized high voltage for bulbs, high efficiency power supply, low heat and long life. Precision better than 1 second per week. Direct brightness control by rotating the encoder. Settings are based on a single button, located at the back of the unit. Power supply adapter included 100-230V input, 12V stabilized output. For some countries socket adapter for outlet (not included) may be required. For US - travel adapter plug supplied. The item "Blue Glass Z560M Nixie clock by Monjibox" is in sale since Monday, March 1, 2021. This item is in the category "Sound & Vision\Vintage Sound & Vision\Vintage Parts & Accessories\Valves & Vacuum Tubes". The seller is "monjibox" and is located in Bucharest, Romania, 020105. This item can be shipped worldwide.