Wireless PIR Motion Sensor Doorbell 38 Chimes Volume Adjustment Long Transmission RangeThe product is shipped based on the color or size of the main image of the product page.Features:*Unique doorbell with motion sensor detector that triggers the doorbell main unit.*Motion sensor range area is about 7 meters area at an angle of 110 degrees,operating range is about 100 meters(open place).*Independent alarm horn,maximum 110dB.38 different ring tones,volume is adjustable.*Receiver host easily plugs into an electrical outlet,motion sensor uses 3*AAA battery(not included) or micro USB power supply.*Applicable to all kinds of shops, hotels,offices,factories,homes,etc.Specifications:Working Voltage of the Receiver:110V-240VWorking Voltage of the PIR Sensor:3*AAA batteries(not included)Working Range: Up to 100 meters(open place)Infrared Sensing Range: Up to about 7 metersPIR Sensor Viewing Angle: 110 degreeMusic source: 38 different songsVolume Adjustment: high, middle,lowReceiver Size: Approx. 80*76*33mm(L*W*H)Sensor Size: Approx. 80*59*45mm(L*W*H)Package Information:Package Size: Approx. 10*9*9cm/3.9*3.5*3.5inPackage Weight: Approx. 160g/0.35lbPackage List:1* PIR Sensor1* Receiver(US Plug)1* User Manual(English)