Yolink Garage Door Controller And Wireless Sensor - Remote Control Existing Product Details 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 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.