Reliable Range - Communication range of up to 100m/328ft (the distance from the sensors to the receiver/alarm/chime) and detection range of the infrared sensor of approximately 6-8m/18-36ft to keep you informed and safe.

User-Friendly - The alarm in the receiver has a ring volume up to 100dB, 3 mode choices (Sound/LED Flash/Sound and LED Flash) and 16 songs choices

Dependable Technology - Our sensor uses a state-of-the-art passive-infrared (PIR) to detect any movement of human bodies or vehicles within the detection zone. Perfect for long or hidden driveways to allow you just a little extra warning before guests (or intruders) arrive.

Expandable - If you have more than one driveway or area you would like to monitor, you can expand this system with multiple sensors and receivers

Power Supply - DC5V/3AAA battery can be used for the receiver, DC3V/2*AA batteries can be used for the Motion Detetor, but don't use them simultaneously in case the host would be burne .(batteries are not included)