DR-E6 USB Coupler This DC coupler is compatible with Canon EOS 5D mk2/3, 6D, 7D series cameras, and others. It supplies power from a USB port (capable of outputting 2.1A or more), boosting the voltage to approximately 7.4V. An AC adapter is not included, so please prepare your own. This product does not support devices that are incompatible with the genuine Canon DC coupler, DR-E6. Please check the compatibility of your device before purchasing.