Abstract: An electrical shock free submersible, remote control switch assembly for controlling the operation of electrically powered apparatus used with swimming pools, spas and the like is disclosed. The switch assembly includes a permanent magnet actuated reed switch mounted in a battery powered, low voltage electrical circuit. The low voltage circuit, in turn, is optically coupled by an opto-isolator to a relay circuit, which is used to open and close the high voltage circuit powering the electrical pumps, lights, blowers, etc. at the pool or spa.