... keyboard for 500,2.4G wireless keyboard 2.Rechargeable via USB port 3.Portable, elegant, lifestyle laptop keyboard for 500,2.4G wireless keyboard with Mouse Trackball2.4G Mini Wireless laser Keyboard ... battery, powered by USB port. LED indicators. Low power comsumption, up to 50 hours continuous use, ... battery, powered by USB port. LED indicators. Low power comsumption, up to 50 hours continuous use, ...