Compatible with models 308-1414B, 308-1414w, 308-1414MB, 308-1425B, 308-1425c, S87078 and S88907 | Wireless transmission of 300ft range (open air).Temperature range: -40 F to 140 F (-40 C to 60 C) | Outdoor humidity: 1Percent to 99Percent RH.Battery powered Requires two AA batteries (not included) | Note : Mount the temperature/humidity sensor on a north-facing wall or in any well shaded location. Sun will make it read high. | Under an eave or 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 300 feet (91 meters) in open air, not including walls or floors