LB1 High Performance Asus Transformer Pad Infinity TF701T 24W/4.2A Dual USB Ports-Fast Simultaneous Charging Car Charger Adapter (Black) LB1 High Performance Dual USB Ports is a convenient must have item. This handy item can be used for that added security in a drastic situation. You are able to charge anything from a mobile phone to a tablet. This item is small and lightweight and convenient for both portability and storage. This item charges any USB device including cell phones|MP3 players|Digital Camera|GPS and eBooks - all you need is your existing charging cable. Also makes a great gifting idea. Everyone can use an extra charging port especially a car charger considering this item in rarely a part of the originally purchased device. High Profile 2-USB-Port Car Charger Adapter. Two 2.1A ports simultaneously charge two devices (24W/4.2A total simultaneous output) at full speed. Can charge 2 devices at the same time. 4.2Amp Quick-charge USB port is compatible with all Smartphones | Tablets | Mobile Devices twice as fast. Input voltage 12V-24V DC. Output voltage 5V DC|4.2Amp. Micro size leaves the adapter almost flush with the dash of your car.