If the 20w fast charge head is used for mobile phone charging, the input voltage is 220V, the output voltage is usually the same as the mobile phone charging voltage, about 5V, and the charging current is 4A right and right. The applicable current of the socket of the home circuit is usually a minimum of 10A, so the charging head can use this socket. Even the strip is usually 250V\/10A. Wireless charging stations can also be used from home outlets.