Door & Window Magnetic Open/Close Sensor — Smart Home Alarm with High Sound, Tamper Alert & App Notifications, 3-Year Battery

Compact magnetic detector for doors and windows that provides real-time remote monitoring and immediate smartphone App notifications whenever an opening or closing is detected. A built-in tamper switch triggers an instant alarm if the unit is removed and sends the alert to the app. Designed for low power consumption with 3 Years of long battery life. The unit features a minimalist acrylic housing and a replaceable battery for easy upkeep. Installation is quick and tool-free — just peel off the double-sided sticker and press the sensor into place.