Garage Door Minder will help you stay safe by letting you know when your garage door is open and your security is breached. Don’t go to bed with your garage door up Easy to install: Stick the transmitter to the door, plug the receiver into the wall No wiring to do, no Internet connection needed, no Wi-Fi needed Includes monitoring and control app that works on Android and on iOS App allows you to set three types of alert (visual, tone, vibrate); on Android, you also can pause your phone alert for 5 minutes, 1 hour, three hours Garage Door Minder comes with transmitter, receiver, and smartphone app. The transmitter installs in seconds on the door. The receiver is placed inside your house. It is equipped with a rechargeable battery.Never go to bed with open garage door again! When the door is in the up position, the transmitter will send the receiver an encrypted signal. The receiver will then notify with a blinking light alert that the door is open. Also alerts your smart phone with screen notifications.