wireless motion sensor compatible with ideal security skqh652 motion sensor alert set. up to a total of 50 sensors can be linked to one receiver. install one sensor at the front of your home or business and a second one at the back. install one in your driveway and a second at your garden shed. many applications. quick and easy to link to the receiver one button to press on the receiver and a wave at the sensor and it s connected. requires 3 aaa batteries (not included). can be installed indoors and outdoors. for outdoor applications try to shield from direct downpours. batteries may freeze and signal is weakened in extreme cold temperatures. SKU:ADIB01HD53IXA