Best Buy: Samsung – SmartThings ADT Wireless Smart Door and Windows Sensor – White only $4.99 (reg $24.99) + Free in store pickup (if available in your area) or free shipping on orders over $35
Receive alerts if doors or windows are opened unexpectedly. Set lights and other connected devices to turn on and off as people come and go.
Requires an ADT Security Hub, plus one or more compatible ADT devices. ADT professional monitoring services may not be available in all areas and may require permitting or additional service fees.