DoubleSight DS-220C. Display diagonal: 546.1 mm (21.5 "), Response time: 5 ms, Display brightness: 250 cd/m². Number of loudspeakers: 2 pcs. VESA mounting interfaces compatibility: 75 x 75 mm. Input voltage: 100 - 240 V, Input frequency: 50/60 Hz, Power consumption (standby): 2 W. Megapixel: 2 MP