Used in various occasions, according to the situation, many different functions can be customized, suitable for hotels, schools, classrooms, gymnasiums, etc. Product Description Dimensions: 48 cm wide x 16 cm high x 4 cm deep/18.9 inches wide x 6.3 inches high x 1.575 inches deep Shell material: aluminum White Control method: wireless remote control Digital height: 4.0''/10.16cm Time format: 12&24 hour format Format: HH:MM (HH means hour, MM means minute) Functions: time, countdown, countdown and stopwatch Countdown from 99:59 to 00:00 Count from 00:00 to 99:59 Brightness: 6 levels, infrared remote control adjustment. Clock accuracy: ±2ppm from 0°C to +40°C, ±3.5ppm from -40°C to +85°C (2 minutes/year) Power supply: AC110~240V depends on the standard of your country, and the output voltage is DC 5V /2A. Installation method: wall-mounted installation What's in the box? 1 clock 1 adapter 1 x IR remote control 1 x User Manual 2 x bracket and screws