TouchpadThis product was added to the innovative functionOf the mouse wheel,when you press the Fn buttonWith your fingers Touch anywhere in the slidingregionk,can facilitate the realization of the mousewheel functions. This human design,it can be easierfor to browse the web better,edit documents. Connecting the receiverSlide the receiver out from the side of keyboard,and insert to the devices with a standard USBinterface. Once connected,slide the power switchto the "ON" position located on the left side of theunit to establish the connection. Auto sleep and wake featureThe keyboard also features an auto sleep and autowake mode. If there is a long period of inactivity,thekeyboard will automatically go into a sleep mode.During the sleep mode,the user can wake the unitup by pressing any key. The 2. 4 GHz receiver andkeyboard's RF indicator will continue to flash andwill not power down. Switching off the keyboard after useAfter finishing using the keyboard,push the switchto the off position. This turns off the power,of thekeyboard. The USB receiver should be plugged outfrom the PC and then inserted back in the keyboardso it is being kept safely. Install AAA*2 batteryplease bring your own,this versiondoes not support the charging function. parametersSpecificationMeasurements (Lx W x H) : 146. 8x97. 5x19mmWeight (grams): 110gOperational Range: up to 10 metersTransmit power: 5db Max. Operation voltage: 3.3VOperation current: