2.4G Wireless keyboard and mouse combo set Effective distance: 8~10m Waterproof designed High-quality membrane key switch Short key structure for ultra smooth, tactile and quiet ke strokes Clearly printed and vanished letters Multi-language available Usage: Comfortable, Mute position & Deft Supports Windows 2000/XP/Vista/7 and Mac etc. Battery: Keyboard: 2pcs *3A Mouse: 2pcs *3A