HawkEye DT2BXTM Depthtrax 1BX Depth Finder w/Transom Mt TransducerThe DepthTrax 1BX includes all the advanced sonar, depth alarm, and keel offset capabilities of the DepthTrax 1B, but also integrates dual temperature displays and an AIRMAR, ultra sensitive, high performance transducer. A simple press of a button on the DepthTrax 1BX display produces instant access to water or air temperature readings via integrated sensors in both the head unit and the transducer. Max depth range is 600'. Algorithmic Programming