[ How thisWIFIAPP Door Chime Works ] This WiFi emergency alarm device can be connected to your cell phone for remote push to take care of the old and young at home anytime and anywhere. When the elderly or children open the door to go out, the hub will sound an alarm, at the same time, the smartphone APP will receive a warning alert, no matter the phone is in another city or province, you can receive a instant warning alert anywhere.

[ Door Alarms for Home Security ] With a reliable long range of 500 feet, this wireless door chime is suitable for home, business, store and other scenarios. If you have children, pets or demented elderly who like to go out, you will receive an alert immediately and you can use this door sensor alarm to keep your family safe.

[ Peace of Mind for the Hearing Impaired ] With built-in LED indicators, the wireless door alarm receiver and sensors provide extra help for the hearing impaired when used in conjunction with the receiver, making their lives easier and giving their families peace of mind.

[ Share Function & Expandable] You can set the sharing function of the tuya app so that when door or window opens, everyone you share it with can receive the alert message; besides thisWIFIcall system is expandable, you can add more hubs, or door sensors to meet the needs of various different usage scenarios.