Ambient Weather F007PF 8-Channel Wireless Pool and Spa Remote Sensor for WS-07, WS-08, WS-09 Weather Stations The F007PF is an additional sensor for the Ambient Weather WS-17 and WS-18 Wireless Pool and Spa Thermometers and supports the WS-07, WS-08 and WS-09 weather stations. The F007PF wireless pool and spa thermometer is water proof and floats on the surface of the water. The sensor displays and wirelessly transmits the water temperature to the display console. The eight channel selectable switch allows you to monitor water temperature from eight different locations. The screw-on lid with locking key design with double internal gaskets provide a leak free, water resistant design. Solar powered with battery back up extends the life of the battery.