The DepthTrax 2BX depth finder includes all the advanced sonar, depth alarm and keel offset capabilities of the DepthTrax 2B, but also integrates dual temperature displays and Includes a Transom Mount Temp Transducer With 30 Feet Of Cable, 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.