Wireless and easy to install.Control panel operated.Allows set up of individual zones.Open field range of up to 125m.Fully expandable system - up to 18 accessories/zones.Solar powered siren uses daylight to maintain charge.Panic button feature.868MHz.Pack includes:1 x LED control panel.2 x door/window contact.2 x PIR movement detectors.1 x solar siren.Batteries, fixings and installation DVD.Requires 3 x 9V PP3 batteries (included) and 4 x CR2032 lithium coin cell batteries (included).