YisTech Caregiver Pager Door Alarms for Dementia Patients/Kids Safety/Home Security,Wireless Door Alarm Sensor for Elderly/Business/Home/Store(4 Sensors and 2 Receivers)

Keep your home/office safety: wireless door sensor chime offers a generous detection area of nearly 260 feet. You could hear doorbell chime as visitors or guests arrive to your home, store, office etc. It sounds to notify you someone enter into, or alert you intruder trying to entry your home. Or remind you when your children/Elderly Dementia Patients open the door/window and sneak around. ^^ Multiple melodies&Loud chime-The receiver Unit has 58 ringtones for your choice. 5 adjustable volume levels from 0 dB to 110 dB. ^^ Provide peace of mind for the hearing impaired: With the built-in LED indicator, the wireless door alert receiver and sensor offer additional assistance when coupled with the receiver to the hearing impaired. Difficulty hearing is no problem with this wireless system.
^^ Easy installation: Plug and Play, Plug the Receiver into an standard Outlet, tear the double-side adhesive tape of the Door / Window sensor and stick them to any door or window. ^^ Customize and Expandable. Each receiver can work with 20 door window magnetic sensors, each transmitter can pair with 20pcs receivers and set to different or same music.