The stylish Wagan Tech Travel Charge Quad USB Power Hub 6.8 Amp EL2891 features 4 USB ports. It is perfect for business trips, carpools, road trips, and nights out on the town. None of your travel companions will have to worry about a low battery ever again.  The stylish Wagan Tech Travel Charge Quad USB Power Hub 9.6 Amp EL2892  features 4 USB ports. Provide enough power for everyone in your group to charge their electronics! It is perfect for business trips, carpools, road trips, and nights out on the town. None of your travel companions will have to worry about a low battery ever again. Charge up to 4 tablets at the same time! Each of the 4 USB ports provide 2.4A of power each (9.6A total); enough power to charge the most recent iPad model.  Additional compatible electronics include: smartphones, digital cameras and camcorders, portable video game systems, mp3 players, GPS devices, and more.  Quickly charge your USB powered devices at their fastest possible speeds (6.8A total). (Other USB hubs and ports do not provide optimal power to your electronics, so they charge more slowly than what they are capable of.) Save time and be more efficient by charging your USB powered electronics with Wagan Tech Travel Charge Quad USB Power Hub 9.6 Amp EL2892 instead. Accessories are also included: 2 mounting tabs with screws and 2 sets of 3M mounting tape. Mounting tabs and screws securely fasten the unit to your vehicle. 2 sets of mounting tape are included for alternative mounting.   Safety include: On/Off switch, short-circuit and low voltage shut-off.