SECRUI Door Chime, Door Open Sensor Chime for Business/Home When Entering, Adjustable Volume, Easy Installation, 400ft Range, 52 Chimes, M508+D7

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About This 【Easy to install】:Just plug the doorbell receiver into any standard outlet and tear the double- sided adhesive tape which on the back of door sensor( or screw mounted) a nd stick them to the door or window is fine,please take the insulating paper away before using the sensor 【24/7 Lifeguard for Your Family】: This child/ home door sensor alerts when burglar opens door and helps deter break-ins(entry alert chime activates when magnetic sensor separates) 【Adjustable Volume Control & 52 Chimes Options】:5 levels of adjustable volume from 0-110 dB.Offer 52 elegant music from the traditional"Ding Dong" to various well know chimes.Memory function: Keep the previous setted tune after re-plugging it 【Wide Working Range】:This wireless door open chime for home is up to 400 ft in open area, magnetic door sensor will automatically trigger the receiver when the magnetic strip is separated and the receiver will alerts immediately whenever the door or window is opened.Not suitable for wooden doors, or windows, doors and mailboxes with excessive clearance distances 【Mini Contact Sensor】: Magnetic door sensor (Size:3.0x1.0x0.60ininch),magnetic strip (Size:1.7*0.6*0.4 inch).They are small size and can be installed or placed at any indoor position to provide you with a door entry chime/alert system.Note：Do not use in the mailbox，The product only has volume and light alerts, no display function Overview Color : White Brand : SECRUI Power Source : Battery Powered Compatible Devices : Motion Detector Battery Description : AAA Show more