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 and 2 Receiver - EU Plug/Black•[Versatile Door Chime]The M8 Wireless Door Sensor Chime is perfect for welcoming customers and notifying staff of arrivals and departures•[Customizable Melodies]Choose from 60 different music options to set the perfect tone for your business environment•[Adjustable Volume]Features 5 levels of volume control,allowing you to set the ideal sound level for your space•[Long-Range Connectivity]Boasts an impressive 300-meter straight-line range in open areas,ensuring reliable performance even in larger establishments•[Easy Installation]Split sensor design with a compact door magnet and separate receiver for flexible and convenient setupSpecifications:•Product Model: M8•Music: 60 musics•Volume: 5 levels•Door magnet size:64mm x 39mm x 14.5mm•Receiver size: 56mm x 56mm x 20mm•Door magnet sensor battery: 12V 23A battery (included)•Receiver: plug-in use (AC 100-240V)•Remote control distance: 300 meters in a straight line on the•open ground (data from the factory laboratory)•Material: ABSPackage included:•2 x Transmitter•2 x Receiver•1 x Installation Kit•1 x English User Manual