Contact King Wi-Fi Alert System - 3-pack

Between the back gate your two- or four-legged escape artist tests hourly, the shed protecting your good tools, and that sliding door that never quite feels closed, you've got access points that need watching. The Contact King 3-Pack Alert System transforms these everyday uncertainties into simple awareness. Each sensor features a generous 40-inch cable that provides flexible placement—inside mailboxes, on cabinet doors, or monitoring garage refrigerators. Beyond just open/close detection, each sensor's built-in Temperature and Humidity monitoring means you'll know if the shed's getting too humid for power tools or if someone left the garage door open during a freeze. Three sensors, countless ways to keep tabs on what matters.