I think this is an excellent deal for people who want to protect their valuable stuffs (bike, tools) in shed or garage. It is very easy to install this and no wiring required.
I have brought this for 15 pounds on ebay and recommend this as the alarm system is equipped with a loud siren to scare off bad people from your garden.
* 105dB extra-loud siren
* PIR movement sensor
* 2 radio controlled key fobs
* Detection range: up to 8m 110°
* Entry and exit delay
* 4 LR6 Duracell batteries included
* Wall mounted with adjustable bracket or portable
* No wiring required