La Crosse Technology WS-9029U-IT Wireless Temperature Station with Waterproof Probe displays indoor temperature and indoor humidity, outdoor temperature, displays the time and has a wired probe that can be attached to the outdoor sensor which will measure a second temperature and display it on the indoor display console. This probe is waterproof and can be dropped into a pool, hot tub, or just buried in the ground. The temperature reading from the probe will display in the channel 2 location. This probe is detachable should you decide not to use it. Transmission speeds are very fast with the 915 MHz transmitter that comes with the WS-9029U. Transmission range is up to 330 feet between the outdoor sensor and the indoor display console.