... Rechargeable via USB port 3.Portable, elegant, lifestyle laptop keyboard for 500,2.4G wireless keyboard with Mouse Trackball2. ... 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 ...