⚡How it Works? 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. ✔️Features: Voice Reminders (6 Modes) Adjustable Volume (0-90dB) Battery Operated No Wiring Needed Tap Installation Long Battery life After-sales Service FAST US SHIPPING!! .
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