Timeguard Supplymaster 7 Day Fused Spur TimeswitchThe FST77 from Timeguard is a fused spur electronic programmable 7 day timer. It is a general purpose timer suitable not only for controlling immersion heaters up to 3kW but it will also switch up to 750W of a variety of lighting including 200W LED (not suitable for discharge lighting). Up to 4 ON and OFF programmes available (5 day plus 2 or 7 day programmes) giving up to 28 ON and OFF programmes per week. Suitable for use with up to 3kW immersion