The instructions for your La Crosse Technology weather station specify which wireless remote sensors can be used with that station.

The TX6U Temperature Sensor reports outdoor temperature (or any other location whose temperature you wish to know) to the station. This sensor does not have an LCD temperature display for viewing at the location where it is installed.

This sensor is wall-mounted, transmits 433 MHz signals and typically operates on two AA alkaline batteries (not included). Average battery life is approximately one year.

The TX6U is particularly well suited to extended low temperature operation.  As the TX6U uses AA batteries, you may use Lithium AA cells, which provide superior operation in sub-zero temperature conditions.

Note:  The TX6U is a direct replacement for the previous model TX2U.  The TX6U, with its AA batteries, can provide superior performance in cold weather.