BrandLogitechManufacturerLogitechModel920-009579Product Dimensions29.6 x 13.6 x 3.2 cm; 423 GramsBatteries2 AAA batteries required. (included)Item model number920-009579Hardware PlatformPC: Windows 7, Windows 8, Windows 10 or later Mac: Mac OS 10.10 or later Chrome OS Android tablet or smartphone: Android 3.2 or later. iPad or iPhone: iOS 5 or later Apple TV 2nd or 3rd generationSpecial FeaturesWORRY-FREE 2-YEAR BATTERY LIFE Two years, two AAA alkaline batteries—pre-installed. So you can take pleasure in forgetting all about it.Mounting HardwareKeyboard 2 AAA batteries (pre-installed) User documentationBattery Average Life17520 HoursBatteries IncludedYesBatteries RequiredYesBattery Cell CompositionLithium IonConnector TypeWirelessManufacturerLogitechItem Weight423 g