Qi is an interface standard designed for wireless energy transfer through inductive charging. This technology is used in the Goui Double-Qi. The wireless charger comprises two slim and soft charging pads, which are situated one above the other and can be swivelled and spread apart. As a result, they provide enough surface area to charge two smartphones at the same time, with 10 watts of power output each. This means that users no longer need to connect their smartphone to a socket or a USB port.