NineLeaf 3PK Wireless Door Sensor Chime Alarm Contact Sensor Doorbell for Office/Home/Store, Door Open Chime with Plug-in Receiver Operate Range 600ft With 48 Chimes 5 Volume Level, IP66 Waterproof - NineLeaf Tech, NL-AMA2-DB03-BELL-3PK+DM07-3PK

• 【Monitor Every Areas You Care with Wireless Door Chime】600ft far enough to cover every door and window in your house. Each wireless doorbell receiver can pair up to 32 magnetic door alarm sensors and each sensor can add unlimited receivers. 【24/7 Lifeguard for Your Family】This business door entry chime alerts when burglar opens door and helps deter break-ins(wireless door alarms activates when magnetic sensor separates) 【Mini Contact Sensor】Magnetic size: 75*26*17mm, magnetic stick size: 40*12*12mm, They are small size and can be installed or placed at any indoor position to provide you with a door entry chime/alert system. 【48 Music with Mute to Loud dB】This door entry alert for business has 5 levels of adjustable volume from 0-97dB.Offer 48 elegant music from the traditional"Ding Dong" to various well know chimes. Memory function: Keep the previous setted tune after re-plugging it. 【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 and stick them to the door or window is fine,please take the insulating paper away before using the sensor., Weight: 0.94 Pounds, Manufacturer: NineLeaf Tech