?You can get? 1 receiver and 2 waterproof IP65 rated wireless infrared motion detectors. The detectors can be installed indoors and outdoors to monitor various locations in your home in all directions. If you have any questions, please feel free to contact seanme. ?Easy, Fast, Wire-free Installation?The sensor can be mounted on the wall, the infrared sensor detects motion and sends a signal to the receiver. Bright LED indicators and a choice of 38 chimes allow you to customize your alerts. ?Wide Range of Uses?Ideal for front doors, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion, also great to alert business owners that are working in the back, or out of sight, to customers entering their store. ?Wireless Plug-in Receiver? The portable wireless plug-in receiver plugs into any standard outlet. The sensor uses 3AAA batteries(not included). Detection time delay in between motion sensor alerts is configurable from 15 seconds to 30 seconds, just place the sensor at the entrance to your driveway and the receiver inside your home. ?Long Distance Wireless?Working range up to 328 feet (100 meters) between receiver and transmitter allowing you to place a good distance from the receiver to warn you of arrival and departure of family members, unwanted guests, or solicitors, or anyone who visits your home or business.