Sensaphone Wireless FGD-WSG30-HUM Humidity Sensor W ith Radio T ransmitter Use the WSG Wireless Humidity Sensor exclusively with the Sensaphone WSG30 Purchase Se parat ely . This humid ity sensor includes both built-in radio transmitter and humidity sensor element for monitoring humidity wherever you install the sensor. The sensor comes with two AA alkaline batteries to 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 Humidity Sensor Product # FGD-WSG30-HUM Operating Temperature Range 32 degrees to 122 degreesF 0 degrees to 50 degreesC Operating Humidity Range 0-100% Accuracy /-3% from 20-80% RH /-5% otherwise 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? x 1.1? 7.9cm x 9.8cm x 2.85cm Compatibility WSG30 Package Contents x1 WSG Wireless Humidity Sensor, x2 AA Alkaline batteries, x1 Mounting kit This item ships from a separate warehouse and may require extra time for delivery.