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WIRELESS DOOR ENTRY ALERT: Know when customers or visitors enter your premises with this wireless magnetic door contact chime. When the monitored door or window opens and the magnetic contacts separate, the receiver sounds an alert. Ideal for shops, offices, reception areas, homes and business entrances. 100M WIRELESS OPERATING RANGE: Enjoy reliable wireless communication between the magnetic door sensor and plug-in receiver, with an operating range of up to 100 metres in open areas. No connecting cables required between the sensor and receiver, allowing flexible installation. 32 MELODIES TO CHOOSE FROM: Choose from 32 different chime sounds to suit your preference and surroundings. The receiver offers a selection of polyphonic melodies, allowing you to customise your visitor alert. 3 ADJUSTABLE VOLUME LEVELS: Select from high, medium and low volume settings to suit different environments. The receiver can also be switched off when the alert is not required, making it suitable for shops, offices, homes and other indoor spaces. EASY INSTALLATION AND SETUP: Simply position the magnetic contact components on the door and frame, plug the receiver into a standard UK 3-pin mains socket and pair the devices using the self-learning function. No complicated wiring or electrical installation required.