About this product: Reliable distance range: Communication range up to 300 m/ 1000 ft (distance between sensors and receiver/alarm/bell) and detection range up to 8 m (distance between sensors and detected objects). Adjustable volume and mode: Alarm volume is up to 100 dB with 3 alert options (high volume bell/low bell/alarm) and 3 mode options (flashing/LED/sound and LED flash). Various applications: Perfect for keeping you informed with a small warning before guests or intruders arrive. You can expand your home alarm system with up to 5 sensors or 5 receivers as needed. Installation tips: Keep the PIR sensors in a clear path to the receiver and do not place the sensors where the wind will move them or change their detection angles, so that you can get optimal performance. Power: You can use 3-pole 1.5V type C (not included) or AC adapter (not included) for the receiver, and 3-pole AAA (not included) for the sensors. Never use type C poles and power adapter at the same time. Product Description Size: 1 receiver with 2 motion detectors - Color: White Security alarm kit for driveway. The driveway alarm provides a convenient and cost-effective way to warn you when someone is coming. When an object is detected, the PIR sensor sends a signal to the receiver up to 300 meters away and you will be informed and safe. Features: Working distance: 300 m (outdoors without obstacles). Motion detection range: 5-8 m. Volume: ≥100dB (within 5m). PIR detection angle: 45 degrees. Protection class (PIR sensor): IP44. Power supply (receiver): 3-pin type C 1.5V / DC 6V adapter (not included). Power supply (PIR sensor): 3-pin AAA (not included). Note: Do not mount the PIR sensor in direct sunlight (PIR detects moving heat sources) or in a location affected by wind. Avoid mounting the PIR sensor and receiver near metal objects. When installing the sensor outdoors, it is best to mount it in a shady and sheltered location to minimize temperature changes. The receiver's ringing may be affected by metal structures, walls and other devices with the same frequency. Contents: 1 receiver. 2 PIR sensors. 1 user manual (English language warranty not guaranteed). 4 plugs and screws.