Rechargeable Li-ion batteries: Last longer up to two weeks between charges. Short recharge time: Around two hours can fully charge the battery. 2.4G wireless: Enjoy long-range wireless control from up to 10 metre (33 feet) away. Backlighting: Makes text entry effortless even in low light conditions. Mini USB dongle, inside case. It is convenient for carring. Compact and lightweight. Plug and play: no need to install software. Support System: -Google/ Android OS -Mac OS -Linux OS -Windows 2000, Windows XP, Windows Vista, Windows 7, Windows CE, Windows Mobile Specification: Operating distance: 10 meters Battery capacity: 800mA Charge voltage/current: DC 5V/300mA Standby time: 400 hours Dimensions: 12.6 * 5.6 * 1.2cm Weight: 86g Package size: 18.5 * 9 * 4cm Package weight: 199g Packing List: 1 * Fly/air mouse keyboard with IR remote l * USB receiver l * USB cable for recharge l * User manual