AcuRite 606TX Wireless Temperature Sensor Replacement sensor for use with select AcuRite products (see compatible model list below) Wireless, weather-resistant sensor measures temperature Sensor data is transmitted every 30 seconds using 433 MHz wireless signal up to 165 foot (50 meter) range Requires 2 AA alkaline or lithium batteries; lithium batteries recommended for -4 degrees Fahrenheit/-20 degrees Celsius or below (not included) Sensor is not compatible with the AcuRite Access that connects to My AcuRite. For a list of compatible displays, please see compatibility list below Replacement sensor for use with AcuRite products (see compatible model list) Wireless, weather-resistant sensor measures temperature Sensor data is transmitted every 30 seconds using 433 MHz wireless signal up to 165 foot (50 meter) range Requires 2 AA alkaline or lithium batteries; lithium batteries recommended for -4 degrees Fahrenheit/-20 degrees Celsius or below (not included) Easy installation includes integrated hanger The sensor is compatible with a variety of AcuRite thermometers and weather stations that display current conditions at-a-glance. Same as model 606TX / 06009RM Temperature: -40 to 158 degrees Fahrenheit; -40 to 70 degrees Celsius Totally wireless and easy to install Durable, weather-resistant construction