FGD-WSG30-DRY Contact Sensor for Use with Sensaphone WSG30 System The WSG Wireless Dry Contact sensor is designed to work exclusively with the Sensaphone WSG30. not included . 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. Made by Sensaphone. WSG Wireless Dry Contact Sensor Product # FGD-WSG30-DRY Operating Temperature Range 32 degrees to 122 degreesF 0 degrees to 50 degreesC Operating Humidity Range 0-95% Input Characteristics 3MO To 3V Range Up to 300' 90m Power Requirements 2 AA Batteries / 5VDC Power Supply Router Mode Wireless Technology ISM 2.4GHz, 100 mW 20dBm Housing White plastic Size 3.1? x 3.8? x1.1?, 7.9cm x 9.8cm x 2.85cm Compatibility WSG30 Package Contents x1 WSG Wireless Dry Contact Sensor, x2 AA Alkaline batteries, x1 Mounting kit This item ships from a separate warehouse and may require extra time for delivery.