Includes: two Type A USB (Universal Serial Bus) sockets with a 3.1A total output, 5V. Ideal for charging various USB (Universal Serial Bus) powered devices such as iPads, iPhones, tablets, cameras & many more. Twin earth fitted as standard to allow a double earth facility for installations requiring high integrity protective connection. Minimum mounting box depth 25mm â ideal for retrofit. Box Contains 1 x Double socket with 2 integrated USB (Universal Serial Bus) sockets (3.1amp)