Simply connects with a USB cable to charge your iPad, iPhone, iPod, Samsung, HTC, Motorola and tablets Effectively helps you to solve the low power problem for your digital devices while on-the-go Two USB ports fits most digital devices Can charge two devices at the same time Compact size and lightweight. General Specs Compatibility- iPhone, iPad, Samsung, HTC, Motorola, MP3/MP4 players, tablet PC, etc. Input -DC12-24V Output -DC 5.0V 1A , 2.1A USB Ports- 2