DELL ST2220T. Display diagonal: 546.1 mm (21.5 "), Response time: 8 ms, Display brightness: 250 cd/m². Cables included: USB, VGA. Power consumption (typical): 28 W, Power consumption (standby): 1 W, Input voltage: 110 - 240 V. Dimensions (WxDxH): 528 x 59 x 380 mm. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 10 - 80 %