Lenovo 4X31S04847 keyboard Mouse included Home/Office RF Wireless + Bluetooth UK English BlackLenovo 4X31S04847. Keyboard form factor: Full-size (100%), Connectivity technology: Wireless, Device interface: RF Wireless + Bluetooth, Recommended usage: Home/Office. Product colour: Black. Mouse includedKeyboardRecommended usageHome/OfficeConnectivity technologyWirelessDevice interfaceRF Wireless + BluetoothKeyboard languageUK EnglishKeyboard form factorFull-size (100%)Numeric keypadYesKeyboard keys operating life10 million charactersWindows keysYesFrequency band2.4 GHzKey pitch1.91 cmBluetooth version5.4Security algorithms128-bit AESCertificationCB\nTUV Mark\nCE\ncTUVus\nFCC\nIC\nIMDA\nWPC\nBIS\nSIRIM\nNBTC-SDOC\nSDPPI\nNTC\nAITI\nTRC\nNCC\nBSMI\nMSIP\nVCCI\nJRF\nKVALITET\nICASA\nTRA\nNTRA\nMOC\nPTA\nICT\nEQM\nBOCRA\nARCT\nETA\nNCA\nPOTRAZ\netc.DesignAdjustable keyboard heightYesProduct colourBlackProtection featuresSpill resistantLED indicatorsYesPowerPower source typeBatteryKeyboard bas