Specifications:Materials: PC, LEDWorking Voltage of the Receiver: AC110V-240V(Plug-in)Working Voltage of the PIR Sensor: 4.5V (3x AAA batteries, Not Included) or 5V USB(USB Cable not included)Working Range: Up to 328 feet (100 meters); Infrared Sensing Range: Up to 23 feet (7 meters)Receiver Size: 8x8cm/3.14x3.14inch, Sensor Size: 8x8.5cm/3.14x3.34inchReceiver Switch Settings:Music source: 38 different songsVolume Adjustment: high, middle, lowThe receiver can be set to sound and silenceSound: sound + indicatorSilent: indicator lightNotes: Please note that this's not waterproof. Keep it away from rains or cover adequately.Tips: Do not place the sensor detector in areas where the wind will move it, also try to keep the detective in a clear path to the receiver, so that you can get optimal performance.Package includes: (Depends on your choise)1X Plug-in Receiver1X PIR Motion Sensor Detectoror2X Plug-in Receiver1X PIR Motion Sensor Detector