The wireless charger incorporates a dual-mount design so that the device placed on it can be charged both horizontally and vertically Compatible with many smartphones that support QI wireless charging. USB Type-C connection Rated voltage 5V/2A, 9V/1.6A, 12 16V/1.7A max. Rated power 20W max. Charging distance ?4mm In addition, the charger recognizes them and stops charging if something is detected between the phone and the charger, preventing overheating. Also, the Mi 20W Wireless Charging Stand uses dual-coil technology, so you can charge your smartphone easily, on or off.