Humminbird WeatherSense Fishing Condition Monitor

Features Compatible with Matrix 10, 15, 20, 25, 35, 55, and 65 fishfinders See increasing or decreasing barometer trend and digital readout on your sonar screen Access full screen, easy-to-understand barometer trend for past 12 hours WeatherSense internal battery and smart monitoring system independently logs the last 12 hours of the information, even if your Matrix unit is not connected Simple plug and-play operation