Review on Daytech Caregiver Pager Emergency Call System: 2 Receivers +2 Panic Buttons For Elderly Senior Home Safety Alerts by Kyle Tebow

My family used this to help care for an elderly relative. This particular product (and others by the same company) work well together. We put one of the buttons on his nightstand and another on his walker, and were able to put the alert units (2 battery powered ones and 2 wall powered ones) throughout the house. All he'd have to do was press the button and we could hear the alert anywhere and come right to his aid!The only minor issue I had was trying to change the tone on all the units. The default option sounds a lot like a doorbell, and might be too similar to your doorbell to differentiate.