The 2GIG DW10-345 Thin Wireless Door/Window Contact Sensor offers discreet and reliable intrusion detection, perfectly suited for installations where space is limited. Its ultra-thin 3/4" low-profile housing allows for unobtrusive placement on narrow door jambs, sliding windows, and various frames in residential and light commercial settings.Operating on a fully supervised 345 MHz wireless network, the DW10-345 ensures consistent signal monitoring and provides alerts for tampering and low-battery conditions. A key feature is its dual normally-closed (NC) dry contact inputs—one internal (using the included rare-earth magnet for precise actuation) and one external—allowing a single sensor to support two independent protection zones for flexible and efficient installations.Powered by a long-life CR2032 lithium battery, this sensor can deliver up to 5 years of maintenance-free operation, reducing service calls. It is ETL-listed to UL burglary standards, guaranteeing code compliance and professional-grade reliability. The DW10-345 is compatible with all 2GIG alarm panels and other systems that support 345 MHz wireless sensors, including many Honeywell systems.