***** **********Best Quality Guranteed. *****10 times Longer Range - Powered by LoRa technology, brings the longest receiving range (1/4 mile) in the market. Our long coverage enables its use in hard-to-reach areas such as basement, porch, guest suite, barns, greenhouse, etc. *****5 times Longer Battery life - Powered by 2 AAA included Alkaline batteries with 5 years of battery life compared to 1 year of other top brands; Battery status will be updated and low battery alert will be sent within APP*****Work with Alexa - Get voice announcements from Alexa Echo when door open or close; Compatible with Google Assistant - Query for the Status of your Door Sensor; IFTTT Supported - Trigger event pipelines by using IFTTT, such as receiving Notifications, Emails, Calls, etc when the door or window is opened or closed*****Instant Notification - Automatically receive mobile notifications when doors or windows are opened or closed; Get a reminder when doors keep open; Check the history of all a