Humminbird 4051301 AS BP Weathersense

The Humminbird 4051301 AS BP Weathersense gives you the weather information you need to adapt your tactics to the constantly changing weather patterns that impact fish. The Humminbird WeatherSense provides increasing or decreasing barometer trends on a full screen view or as a digital readout on your sonar screen if you choose. Plus, the unit has an internal battery and smart monitoring system that always logs the last 12 hours of the barometric pressure, so you'll start the day with accurate, up-to-date trend information. The Humminbird WeatherSense comes with several advanced features, including a user-disabled Sleep Mode Trending. It's powered by a user-replaceable Lithium battery (type CR2450 or equivalent) and has a low-battery detect to inform you when to change/install the Lithium battery.