Size: 660x160x40mm (26" x 6.3" x 1.6"). Power supply: AC110-250V, DC 12V. Clock Mode: 12Hours-[H1 HH:MM], 24Hours-[H2 hh:MM]. CountUP Mode: [UP MM:SS]. CountDown Mode: [dn MM:SS]. StopWatch Mode: [MM SS:MS]. Intervals custom Mode: [F1 MM:SS & C1 MM:SS], F = Work Period, C = Reset Period. At the same time supports 10 personal Custom training time, P0-P9. Intervals Preset Mode: have 3 groups, F1,F2,F3. F1 = [F=1MINS,C=30SECOND,8Rounds], F2 = [F=40SECOND,C=20SECOND,8Rounds], F3 = [F=20SECOND,C=10SECOND,8Rounds]. Brightness: 10 Levels adjustable, adjust by IR Remote control. Preparation time: 10 seconds, enable or disable. Sound: enable or disable. Clock Accuracy: ±2ppm from 0°C to +40°C, ±3.5ppm from -40°C to +85°C Need more digits ? Please purchase 8digits from http://www.amazon.com/dp/B0777C4KWC Need a spare remote control ? Please purchase it from http://www.amazon.com/dp/B01F4MUY0E Note: the remote of timer Not included battery, please purchase the battery from Amazon or your local store, the battery model is CR2025.