GKM520 Wireless Keyboard and Mouse Set – Black Slim wireless keyboard and mini optical mouse set with tiny USB receiver. It is an ideal input device for you PC, laptop and notebook. It adopts 2.4GHz wireless transfer technology, it has strong and secured wireless signal, allows you to enjo your PC/Laptop from anywhere. It features new slim keys allowing a smoother and quieter experience when typing New improved 2.4GHz wireless for much greater range(up to 10 meters), less chance of interference from other nearby wireless devices; Key stroke life: 8,000,000 times Wireless optical mouse with good touch feeling you can never imagine Tiny USB receiver fits discreetly in bottom of mouse and its range up to 10 meters(line of sight) (Pls note: Battery is not included) Key Features: GKM520 Wireless Keyboard and Mouse Set – Black Bluetooth Version: Not Supported Interface: USB Power supply: AAA battery System support: Windows XP,Windows 7,Windows 8,Windows 10Transmit Range: 10 meters Keyboard Lifespan ( times): 5 million time