Reliable Technology Motion Detection: Alarm system based on complete independent motion sensor, PIR motion detector has 120 detection and 180 flip design, communication range up to 328ft/100m (sound range in open places) and infrared sensor detectionrange about 16- 26ft/5-8m, 125dB siren or loud bell pattern and state-of-the-art passive infrared (PIR) to detect any movement within the detection area to keep you informed and safe Simple to install just mount it on the right side Location: Mounted on the wall or vertically on the ceiling. Mounting the motion alarm is easy with 3M tape and a 360-degree rotatable wall mount. No monthly fee, no contract, no wifi network. Hassle-free setup powered by 3 AAA batteries (not included) or USB cable. The wireless design really reduces the hassle when installing motion sensors due to battery power. The 360-degree rotatable stand has a wider detection angle, which is very suitable for multiple scenarios such as home, office, warehouse, etc. (Note: Do not install outdoors as the sensor is not waterproof.) One second to arm/disarm just slide a buttonon the remote control to enable or disarm the sensor as needed. Expandable to expand this A1 PIR motion sensor with more home alarm system accessories. You can expand the system with up to 50 additional sensors or more than 20 receivers. ) Delivery Quantity: 1