①. WIDE RANGE OF APPLICATIONS: The wireless weather resistant motion sensor can be used to monitor and protect your outdoor/indoor property, such as driveway, front porch, gate, pool, garage, shed and etc. It is suitable for home, business, and office. The sensor will work properly in all seasons with a working temperature range from -30 to 150 degrees Fahrenheit. ②. 1/2 MILE LONG WIRELESS TRANSMISSION RANGE: Both the motion sensor and plug-in receiver can pick up alarm signals up to 1/2 mile away (actual range will vary depending on the local terrain), which is a solution for monitoring a large perimeter or property. The system adopts improved wireless transmission technology (FSK+FHSS) to avoid wireless signal interference from other devices. ③. 50-FT WIDE MOTION DETECTION RANGE: The motion sensor can detect moving people or vehicles from 35 feet to 50 feet in front of it. It is equipped with an improved motion detection chip and detection angle to reduce false alarms caused by dead leaves, small animals, sunlight, wind, temperature changes and etc. It has 2 adjustable sensitivities (Low=35ft; High=50ft), suitable for driveways, walking paths, yard, garage, gate, pool and other outdoor/indoor areas where you need alerts. ④. PLUG AND PLAY, EASY TO INSTALL: Power on the motion sensor with 3pcs AA 1.5V Alkaline batteries (batteries not included in the package) and plug the receiver into the outlet. The unit has been programmed before shipping. Place the sensors on walls, fence posts, trees, or any other surface, and the installation can be completed in a few minutes.