Yolink Garage Door Controller And Wireless Sensor - Remote Control Existing Product Features World's Longest Wireless Range: Powered by LoRa technology, the long-range yet low-power system offers the industry?s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. Universal: Easy-to-add functionality to upgrade your existing garage door opener. Compatible with door openers manufactured after 1993 that utilize photoelectric sensors; Please check compatibility at the description before purchase Low-Power Means Longer Battery Life: Because of the low power consumption, YoLink Garage Door Sensor's batteries may last 5 years or more (depending on application and device usage/activity), on standard AAA Alkaline batteries (lithium batteries not required)! Early-Warning Notifications: Receive real-time early-warning notifications in the form of smartphone banner alerts, limited SMS/text messages, and emails, each optional and configured per your needs. Please note: YoLink Garage Door Sensor does not alarm or chime, it only sends notifications; For an audible alarm, consider our Siren Alarm Doesn't Work without YoLink Hub: YoLink Hub is the only central controller for YoLink devices, and it connects YoLink devices into the internet and the cloud. Without YoLink Hub, this garage door kit does not work with YoLink app and does not support 3rd-party integration with Alexa, Google Home and IFTTT. Please search B07TQLKQLJ for the hub or try our Garage Door kit with Hub B07W64LMKC Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!