For Asus Eee Pad Transformer Prime TF201 / Transformer 3G Tablet Dual USB Car Charger Adapter Dual 2-Ports USB sockets allow you to charge 2 devices at once Output: 5V-2100mA Output Charge most devices that use a USB charging cable, (eReader, iPod, iPhone, cell phone, MP3, PDA, Blackberry etc..)) IC Chip recognizes a full battery & automatically switches to saver mode USB Cable is not included.