Bought 04.2010 for THB 590.-,used as temporary solution until set up a complete alarmsystem in 06.2010. Each set contains 1 Sensor Alarm Unit with magnet, 2 remotes for arm / disarm the unit per set. The units are to be fixed with double-sided adhesive tape (included) for example on the door and the door frame. The Sensor Alarm Unit and the remotes can be coded by DIP-switches easyly. It´s possible to set up the same code for both units and 4 remotes. So it´s possible to control all 2 units simultaneous with 4 remotes. Location : Phuket (shipping possible) Price (per set) : THB 300,-