4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA M8 Commercial Wireless Door Magnet Sensor Chime Welcome Visitor Alert with 2 Transmitter + 2 Receiver - EU Plug/BlackVersatile Door ChimeThe M8 Wireless Door Sensor Chime is perfect for welcoming customers and notifying staff of arrivals and departuresCustomizable MelodiesChoose from 60 different music options to set the perfect tone for your business environmentAdjustable VolumeFeatures 5 levels of volume control,allowing you to set the ideal sound level for your spaceLong-Range ConnectivityBoasts an impressive 300-meter straight-line range in open areas,ensuring reliable performance even in larger establishmentsEasy InstallationSplit sensor design with a compact door magnet and separate receiver for flexible and convenient setupSpecifications:Product Model: M8Music: 60 musicsVolume: 5 levelsDoor magnet size:64mm*39mm*14.5mmReceiver size: 56mm*56mm*20mmDoor magnet sensor battery: 12V 23A battery (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: ABSPackage included:2 x Transmitter2 x Receiver1 x Installation Kit1 x English User Manual