The Ansmann Quattro Mains and 12V DC In Car charger has 4 USB Ports. This allows up to four USB devices to be plugged in and powered or charged at the same time, either at home or in the office using the 100-240V mains plug or on the move in the car using the 12V DC charging plug. Output 5V Maximum Output 2 Amps (Divide the 2 Amps by the number of USB ports being used, so if you are using all 4 USB ports each one will be 500mAmps). Ideal for a Blackberry, iPhone, iPod or MP3 player. Any device that has a USB charging cable.