Each Socket has 2 x type A USB sockets - 3.1A total output, 5V. Charges iPad, iPhone, tablets, mobiles, cameras and more. Minimum mounting box depth 25mm - ideal for retrofit. Masterplug 322U-ZD Double Switched Socket with USB Charging Free up your sockets - Ideal for charging iPads, iPhones, tablets, mobiles, cameras and more White switched socket with 2 x 21 Amp USB charging ports Fits a 25mm back box - Ideal retrofi Manufactured to BS5733, BS 1363-2, EN 609 2 x type A USB sockets – 3.1A total output, 5V. Charges iPad, iPhone, tablets, mobiles, cameras and more. Minimum mounting box depth 25mm – ideal for retrofit. Twin earth fitted as standard to allow a double earth facility for installations requiring high integrity protective connection Ref. BS 5733 and BS 60950 Box Contains 2 X Double socket with 2 integrated USB sockets (3.1amp).