Wireless Driveway Alarm,Home Security Alarm,PIR Motion Sensor Alert System CERTIFIED: Wireless motion detectors certifid to R&TTE(CE) and FCCID(USA) LARGE DISTANCE ALARM: A wireless receiver chimes to alert you when a person or vehicle comes within 400 ft. range (the distance between the sensor and the receiver) POWERFUL PIR MOTION SENSOR: Powerful outdoor weather-proof infrared sensor detects motion and sends a signal to the indoor wireless receiver; PIR motion detector range approx.9m/29ft; Outdoor sensor certified to IP44 FEATURE AND WIRELESS POWER SOURCE: 1) Sensor: Passive infrared (PIR) motion detector. Transmitter: 433MHz; With 1 LED indicator; Powered by: 1x 9V (E) (battery not included); 2) Reveiver: Volume Settings: Hi/Low; With 3 LED indicator; Powered by: 3x 1.5V (C) (battery not included) EASY INSTALLATION: Wireless sensor and wireless receiver make you forget the cables, locate the item anywhere which is perfect for you (you can put the item on table or mounting it on wall as you like); Easy installation, mounting hardware included (3 screws + 3 plugs)