Check the listing for details. Voice Door Alarm When Opened Caregiver Pager Help System Wireless Doorbell Chime. Color: White, Condition: New, Made in China. Listed at 24.91 USD. Door Open Alarm: ✔️This voice alert door alarm features a magnetic contact sensor. When the door opens and the sensor separates, it instantly triggers the alarm hub to play a clear voice alert, so you always know when a door is opened. Wireless Doorbell Chime: ✔️Wireless Doorbell→Every time the button is pressed, the self Powered wireless doorbell its own power, sending a strong and reliable signal to the receiver. Lifetime battery free, saving you time, money, and the hassle of replacing batteries.ements saving you time, money, and hassle of battery maintenance Wireless Caregiver Pager: ✔️Wireless caregiver pager system , perfect for the elderly, patients & disabled. One press sends an instant alert, letting caregivers move freely while ensuring help is always available.