*PLEASE VERIFY compatibility ~ ONLY WORKS with model clock/weather stations (not limited to): 308-1414B, 308-1414W, 308-1414MB-INT, 308-1711BL, 308-1425B-INT, C85845, S75617 and S77925 (more models listed below) | Temperature range: -40°F to 140°F (-40 °C to 60 °C); Outdoor humidity: 10% to 99% RH | Transmission range: 330 ft. (100 meters) in open air (no obstructions) | Powered by 2-AA batteries (not included) | *upgraded TX141TH-B (backwards compatibility with any weather station using TX141TH-B, v2, v3) | **Note: Mount the sensor on a North-facing wall or a well-shaded location. Direct sunlight will make the temperature read high. Recommended: 6 inches below eaves or placed under deck rail is preferred. Be sure the outdoor sensor is mounted vertically to drain moisture. The maximum wireless transmission range to the weather station is over 330 feet (100 meters) in open air, not including walls or floors.