QBell Technology QBL.216WE. Display diagonal: 546.1 mm (21.5 "), Response time: 2 ms, Display brightness: 300 cd/m². Number of loudspeakers: 2 pcs, RMS rated power: 4 W. On Screen Display (OSD) languages: ITA. Tilt angle: 0 - 20 °. Input voltage: 100 - 240 V, Input frequency: 50/60 Hz, Power consumption (standby): 1 W