Two Channel Real Time Switch with 25 On/ Off Setting uses one channel to control Air Conditioners, with power on delay of 3 minutes to save compressor from frequent power interruptions and has 2 On/Off settings in the other channel. Johnson & Nelson supplies Two Channel Real Time Switch with 25 On/ Off Setting. Johnson & Nelson is the manufacturer of electronic products like STD locks, 2 line conference telephone, auto Caller and Multi channel real time switch. The Two Channel Real Time Switch with 25 On/ Off Setting of model number TOS2AC-25 is mainly used in factory and office to save power and also in flats and houses to give an impression of occupancy that acts as a deterrent to thieves.