Versatile Door ChimeThe M8 Wireless Sensor Door Chime offers a professional welcome and farewell solution for businesses, with 60 music options to choose fromAdjustable VolumeFeatures 5 levels of volume adjustment, allowing you to set the perfect audio level for your environmentWide Detection RangeInfrared sensor detects movement from 2-7 meters away (depending on humidity) with a 110 left and right sensing angle for comprehensive coverageLong-Range ConnectivityBoasts an impressive 300-meter straight-line remote control distance in open areas, ensuring reliable operation even in larger spacesEasy SetupReceiver plugs directly into any standard AC 100-240V outlet for quick and simple installationSpecifications:Product Model: M8Music: 60 musicsVolume: 5 levelsSensor sensing distance: 2-7 meters (depending on humidity)Sensing angle: 110 left and rightSensor: powered by 3*AAA battery or power cord (not included)Receiver: plug-in use (AC 100-240V)Remote control distance:300 meters in a straight line on theopen ground (data from the factory laboratory)Material: ABS