This wireless waterproof magnetic sensor is for use with our ismartgate PRO/LITE Wi-Fi controllers. Use it to remotely monitor the status of your gate or garage door from a smartphone, tablet, PC or Apple Watch. The sensor sends real time alerts through the iPhone/Android/Homekit app or via email when the door is open, closed, or left open Please note: this is not a stand-alone product and is only for use with ismartgate Pro and Lite devices. 30-ft long cable and 24# AWG gauge: The wired sensor WDS comes with enough cable for residential, commercial or industrial applications. No battery required: This sensor does not require batteries. Ideal for gates or garage doors with lots of traffic. Easy to install: The wired sensor WDS can be screwed or pasted to a gate, whatever you prefer. Connection to iSmartgate is via cable screwed in ports 7 to 10. Waterproof: The wired sensor WDS can be used in all kinds of environments. Ideal for outdoor use or areas with severe temperature changes. 1.5-inch gap: The wired sensor WDS includes a potent magnet with 1.5-inch gap to detect status on all kind of gates, no matter the conditions. Real time alerts: Receive alerts when gate is open, closed or left open on your Smartphone or via email. ismartgate device required. Compatible with roller doors and pedestrian gates: The wired sensor WDS is also recommended for use in roller doors and shutters. Can also be used to monitor pedestrian gates/doors traffic.