It is small and compact and can do everything what the large wireless charging stations can do. Current smartphones that are already familiar with wireless charging technology can be charged with it without any problems. Overheat and overvoltage protection. Input current: 5V/2A/5W; output current: 5V/1A/5W. 1 charging coil, 5W. plastic, white, Coils: 1, including usb cable, integrated overvoltage and short circuit protection, Output (wireless): 5 watt, USB 1.1, 2.0 compatible, Wireless charging, with overheat protection