Promethean ActivBoard 378 Pro. Aspect ratio: 4:3. Interface: USB. Speaker power: 20 W. Windows operating systems supported: Windows XP SP2, Windows XP SP3, Windows Vista, Windows 7, Mac operating systems supported: Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Linux operating systems supported: Ubuntu 8.04, Ubuntu 8.10, Ubuntu 9.04, Ubuntu 9.10. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 70 °C, Storage relative humidity range: 0 - 90 %