The Inovonics EN1215WEOL Door/Window Transmitter is a wireless device designed to monitor doors and windows in residential or commercial security applications. Equipped with end-of-line (EOL) resistor supervision, this transmitter ensures enhanced tamper detection and secure signal transmission. The EN1215WEOL provides reliable wireless communication to the control panel, enabling immediate alerts if a door or window is opened or tampered with. It’s built for durability and ease of installation, making it a versatile addition to any security system. Inovonics EN1215WEOL Door/Window Transmitter. What you need to know about the return. Please keep all the contents of the box in the original packaging. This is not applicable to those who received a damaged package. To ensure that your order is delivered on time please make sure your address and your full name are correct. Box at this time.