Charge all your devices simultaneously through one convenient USB hub with the powerful 4.2 amp Digipower ACD-400I InstaSense 4 Port USB Wall Charger! With 4 USB ports you can charge a variety of items using your own charging cables. The charger uses new InstaSense technology, which senses the power requirements of any smartphone or tablet to provide the proper charging levels. Plug this sleek charger into you wall plug at home, or easily bring it with you for convenient charging of USB devices.