... Any key to wake up. Built-in rechargeable lithium-ion battery, powered by USB port. LED indicators. Low power comsumption ... SmartTV, PCTV, HTPC, Projector, etc. Ideal for entertainment, conference, lecture, presentation etc. laptop keyboard for 500,2.4G Mini Wireless laser Keyboard ... Any key to wake up. Built-in rechargeable lithium-ion battery, powered by USB port. LED indicators. Low power comsumption ...