300D Wireless Visitor Alarm Entry Alert Door Chime(Grey) Tag-Microscope Magnifier Series support plug and play

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300D Wireless Visitor Alarm Entry Alert Door Chime(Grey) Tag-Microscope Magnifier Series support plug and play1. The Visitor Chime is a light sensitive, motion activated entry chime suitable for office and retail locations to announce the entrance of visitor. 2. Sensing distance up to 4~5m. (Normal light conditions required) It is recommended to be placed with light source in front of the unit. 3. It may be mounted on wall or ceiling using the enclosed wall mount plate or mounting bracket. The mounting bracket can be adjusted 120 degrees for optional