... Any key to wake up. Built-in rechargeable lithium-ion battery, powered by USB port. LED indicators. Low power comsumption ... to 5000 hours standby time. Snap-in USB receiver. Compatible with PC, laptop, tablet PC, Google TV, IPTV, SmartTV, PCTV, ... HTPC, Projector, etc. Ideal for entertainment, conference, lecture, presentation etc. laptop keyboard for 500,2.4G Mini Wireless laser Keyboard ...