Multi-Channel Real Time with 30 On/ Off Setting uses first channel to control school bell or factory siren and comes with 2 On/Off settings in the second channel. Johnson & Nelson is the manufacturer of electronic products like STD locks, 2 line conference telephone, auto caller and Multi channel real time switch. The Multi-Channel Real Time with 30 On/ Off Setting of model number TOS2S-30 finds suitable application in Factories schools, colleges etc.
