LED 7 segment display: Hour, minute. Legible up to 5 meters Height of digits: Hour and minute =18 mm Second: circle line of 60 LED. 0 80 mm backup of time information during 2 days by internai Ni-Mh battery in the event of mains failure.Power supply:•230VAC/50-60HZ. Classe 2 115VAC/50-60HZ. Classe 2•18 to 36 VDC.9VDC 1A on connector Operating température range: -20°C to +70°C Gloss painted ultra-flat aluminium case. Wall mount surface Dimensions: 115 x 115 mm - Thickness 40 mm. Net weight 1 5KgManual adjust luminosityCompiles to standards for résistance to fire EN 60950 and IEC 60950.