USB outlet approved to AS/NZS 60950.1. The rating for the USB is 3.4A at 5V when one device is inserted then it divides to split the output when a device is inserted in each USB socket. USB power supply contains temperature cut out and overload protection. Fits standard wall boxes and mounting accessories. Full cover plate. Covers, plates and dollies are made from UV stabilised polycarbonate to avoid discolouring to yellow. Standard colour is white.