Deterrent burglars and gain peace of mind with the Yale IA-230 Plus Wireless Intruder Alarm Kit, designed to be both pet friendly and adaptable to indoor and outdoor settings. The kit includes a main alarm unit, easy-to-fit sensors, and operates on a battery power source, ensuring that installation is fuss-free and can be accomplished quickly. **This is a new kit, unused but just opened. ** It's a complete kit with 3 extra pet friendly sensors £35 per one rrp. It has all its tabs in the back of the sensors and is mostly all packaged up, a few minor marks on the back from moving house but basically a new kit plus extra. Feel free to ask any questions.