... for 1 USB, 1A for 2 Our EB-701A, PowerRing is designed with 3.1A output power which you can charge both iPhone ... . Main Features:1:Compatible with different connectors for multiple phone types or devices, including for iPhone, iPod, Nokia, Blackberry, Motorola, Samsung, Sony Ericsson ... : DC 5V 2.1A for 1 USB, 1A for 2 USB Total output:2.1A portable dual usb car charger with MFi for iphone 4s