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

【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) and stick them to the door or window is fine,please take the insulating paper away before the usage of the sensor
【24/7 Lifeguard for Your Circle of relatives】: 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 Keep an eye on & 52 Chimes Options】:5 levels of adjustable volume from 0-110 dB.Offer 52 elegant music from the traditional”Ding Dong” to quite a lot of 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 robotically trigger the receiver when the magnetic strip is separated and the receiver will alerts right away on every occasion the door or window is opened
【Mini Contact Sensor】: Magnetic door sensor (Size:3.0×1.0x0.60ininch),magnetic strip (Size:1.7*0.6*0.4 inch).They’re small size and may also be installed or placed at any indoor position to offers you a door entry chime/alert system.