Wireless charging at 15W. applies to pencils, watches, phones, and earbuds. protection against foreign objects, overvoltage, and overcurrent. 5V/2A and 9V/2A are inputs. The phone uses 5 watts, the earphone 2.5 watts, the watch 2.0 watts, and the pencil 0.5 watts of the 10W, 7.5 watt output.