WSG Wireless Dry Contact Interface Connect to any normally-open or normally closed output. The WSG Wireless Dry Contact sensor is designed to work exclusively with the Sensaphone WSG30. This sensor includes a built-in radio transmitter and input terminals for connecting to any normally-open or normally closed output. (Use of this device with solid-state outputs is not recommended.) The sensor comes with two AA alkaline batteries which will power the sensor for up to two years. An optional plug-in power supply is also available. The batteries then become a backup if main AC power fails. Connect any NO/NC output via screw terminals Optional power supply suggested when sensor is used as part of a mesh network This unit is powered by 2-AA batteries, included, Option Power Supply: 5 Volts DC (Part #XFR-0041) Requires a WSG30 Device
