This Yale HSA Essentials alarm kit provides a simple and wireless solution for home security. It's battery-powered for easy installation and includes a siren, two PIR motion detectors, a door/window contact, and a keypad. The system is expandable up to 20 accessories, has a 30m range, and a 20-second entry/exit delay. The 104 dB siren alerts you to activity and deters intruders. Enjoy security without monitoring fees, contracts, or hidden costs. The kit comes with batteries and fixings for immediate setup. Compatible with Yale HSA accessories for further expansion. Features keypad operation, wire-free setup, and a two-year manufacturer's guarantee.