Arrived in very quick time; well packed & quite decent quality in terms of construction.
The alarm does lack instructions other than a few brief words on the packaging itself. But you're not really told what happens when you want to set the alarm, or what the green & red lights mean; how long you have to evacuate the room once set; or how long you have to switch the alarm off when you re-enter the room.
Apart from that, installing the alarm was easy and straight forward enough. The alarm needs 4 "AA" batteries, so make sure you have a good supply. I can't comment on how long they last as I've only had the system for a day or so; but other reviewers seem to think the alarm eats batteries for breakfast, lunch and dinner! (Although you can add a DC mains adaptor if you prefer)
The two remotes are good and well constructed. Don't forget to remove the plastic film at the back of the remote to "turn on" the batteries inside. I would also suggest buying some spare remote batteries just as backup.
Once rigged up its fairly easy to set the alarm with the single multi-function (arm/disarm) RC button. I would say you have about 15 seconds to leave the room before the alarm "sets". Once you re-enter you have about 5 or 6 seconds to disable the alarm. This time delay bothers me because it means any quick minded thief might be able to pull or hit the alarm from its mooring and quickly remove the batteries. Which highlights another weakness with this alarm: the lid that covers the batteries just slips onto the unit with just a touch of force. And likewise for removing it. What would have been useful is to have the lid screwed to the unit as well, which would mean a thief would not be able to remove the lid in time to remove the batteries before it went off.
But I do like this alarm. For the price it certainly acts a good deterrent for the opportunist. It's cheap, simple and effective, especially for sheds, garages & conservatories.
4/5