Bought for our home to me this set. The sensors can be easily installed using the supplied adhesive strips on doors and windows. After that screwed the 3 motion to the wall. Then the super tip of the seller: the controller first time 30 minutes into the wall outlet and turn on the switch for the battery back to "on". After that you can conveniently remove the unit from the wall outlet and go through all the rooms to program each individual sensor. Took me 10 minutes. Just great. After that the SIM card in and enter the phone numbers ... done !!! All together took less than an hour. Have of course immediately a few alarms triggered to test and it works great! My delivery was unfortunately broken a remote control, which was but I replaced immediately. Ever MKT is a very obliging and competent shop which always immediately through the hotline (sometimes even on weekends) is one with advice and act to the side. Am really excited and can recommend to the very reasonable price this alarm.
