This kit makes it possible to turn up to 3 devices on/off over the telephone. It is also possible to check the condition of a switch (open/closed). Ex.: when away on holiday, you may switch the lights on/off, check the alarm or turn on the heating. An advantage of this circuit is the fact that audio signals are used to tell whether a specific output has been turned on or off. Operation is protected by a user defined code, which is keyed in from the telephone keypad.

Specifications: a relay is included for one output 10A/250V AC, automatic pick-up can be selected for ±8 or ±3 rings, automatic hang-up if no code is entered within 20 secs., supply volt 12V AC/300mA, dimensions: 4.1" x 5.1"