This iSmartGate Wireless Magnetic Sensor is an additional waterproof sensor for the iSmartGate universal Wi-Fi gate controller. The iSmartGate wireless sensor will monitor the status of your gate or roller door, as well as outside temperature and battery condition. Receive real time alerts on your phone or via email through iSmartGate access, Homekit or Google Home App. It's easy to install with no cables or wiring required! Simply put the provided batteries inside the sensor, place and stick sensor on a suitable place at the gate, and link the sensor to your iSmartGate Wi-Fi controller via the iSmartGate app. The iSmartGate wireless magnetic sensor is waterproof, so it can also be used in outdoors on any type of gate.