Garmin gWind Wireless 2 Transducer [010-01616-00]gWind Wireless 2 Transducer Eliminate Wires Through Your Mast Features: An easy to install solution that eliminates running wires through masts up to 50 feet 3 bladed propeller for more accurate wind speed in lighter wind conditions Twin fin design gives a more stable wind angle Solar panel mounted on the transducer arm Internal solar charged battery lasts 3 years and is easily replaced The gWind Wireless 2 transducer offers an easy to install