DeviceLinked gLink - open your garage with your phone Super easy installation, no battery, no power cord required, compatible with most garage openers in the market, see description below. Only product in the market which can control the garage opener's light for major models of garage openers. Based on Bluetooth LE technology with AES128 encryption for all data, secure from internet breaches. Supports iPhone (iOS8.0 or later) and android (OS4.4 or later ) One gLink supports multiple users; One App/phone supports unlimited gLinks/doors. If a wired door sensor is connected to gLink, the status of the garage door (open/closed) can be shown on the App/Phone within gLink signal range. Door sensor doesn't come with this item.