Wireless and easy to install. 36 zone telecommunicating LCD control panel. Calls up to 4 phone numbers if the alarm is activated. Remote phone access. Open field range of up to 125m. Fully expandable system - up to 36 accessories/zones. Solar powered siren uses daylight to maintain charge. 868MHz. Panic button feature. Pack includes: 1 x LCD communicating control panel. 2 x door/window contacts. 2 x PIR movement detectors. 1 x solar siren with LED indicators. 1 x dummy solar siren. Batteries, fixings and installation DVD. Requires 3 x 9V PP3 batteries (included), 4 x CR2032 lithium coin cell batteries (included) and 4 x 1.5V C batteries (included).