Door Bells & Chimes features: Wireless PIR Motion Sensor Doorbell 38 Chimes Volume Adjustment Long Transmission Range Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. 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-240V Working 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 meters PIR Sensor Viewing Angle: 110 degree Music source: 38 different songs Volume Adjustment: high, middle,low Receiver 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*3.5in Package Weight: Approx. 160g/0.35lb Package List: 1* PIR Sensor 1* Receiver(US Plug) 1* User Manual(English)