MK Shaver/Toothbrush Socket Outlet design incorporates a double wound isolating transformer rated 20VA at 230 or 115 volts and meets BS EN 61558-2- 5:1998 making it safe for use in bathrooms. Insertion of a shaver/toothbrush plug automatically switches on by energising the primary side of the isolating transformer removal automatically switches it off. The transformer is protected against overload by an automatic solid state overload device with automatic resetting. Only one size of screwdriver required for installation.