WiFi Door Sensor Chime, Smart Door Open Alert Window Sensor for Business/Home/Kids Safety, Real-Time App Notification, 500ft Range, 32 Melodies, 5 Volume Levels, Window Contact Sensor Alarm Kit

From the brand

Satisure was established in 1993 with the vision to improve, innovate and create more effective home security products, making life safer and more secure, and serving as a strong protection shield for you, your loved ones, and friends.

Real-Time App Alerts for Safety – Monitor your home from anywhere via the Tuya/Smart Life App. Perfect for child safety and dementia care—receive instant push notifications the moment a door or window is opened.
Loud Chime for Business & Home – Never miss a customer with 5 volume levels (up to 110dB). Assign unique ringtones to different sensors so you know exactly which door triggered the alert without checking your phone.
100% Wire-Free DIY Installation Plug and Play in Minutes – Simply plug the receiver into an outlet and stick the sensor using the included adhesive. Fully expandable to support up to 20 sensors for complete coverage.
Family Sharing & Auto-Memory – Share device access via the App so multiple family members receive alerts simultaneously. The smart memory function retains your melody and volume settings even after a power outage.
Free Notifications No Monthly Fees – Enjoy Free App Push Notifications without subscription costs. Optional paid SMS or phone call alerts are available for users who need offline security reminders.