The DepthTrax 2BX is an updated version of the 1BX which includes all the advanced sonar, depth alarm, and keel offset capabilities, but also integrates dual temperature displays and an AIRMAR , ultra-sensitive, high-performance transducer. A simple press of a button on the DepthTrax 2BX display produces instant access to water or air temperature readings via integrated sensors in both the head unit and the transducer. The DepthTrax 2BX delivers a combination of performance and affordability unr