The Magnetic switch is an electronic switching device designed to be used as a switch for JETI model products which are fitted with a switching output, as with the Jeti Central Box or DPS40, these are not for switching receivers. see below for switching receivers. A big advantage of electronic switches in comparison to mechanical switches is that, in general, electronic switches are highly resistant to vibration. Also, virtually an unlimited number of ON and OFF cycles is guaranteed with an electronic switch. Because electronic switches have no mechanically movable elements, contacts etc. to wear out, an extremely long service life is another important feature. Unlike with mechanical switches, electronic switches cannot be unexpectedly or falsely tripped.
Please note this unit is supplied without the Magnet which can be found HERE
If you wish to use a magnetic switch for turning on the receiver either of theses switches will do the job.