These are the six pin tranducers for older Garmin depthsounders and plotters. Choose the transducer or sensor that best suits your needs. Transducer kits come with installation instructions. Please follow these instructions carefully to ensure proper operation. • Transducers only provide raw data, and must be connected to a processor (usually a depth sounder with a display, or a “black box” sonar module) in order to display depth, speed, etc. Depth transducers are commonly available in 50/200 KHz (deep/shallow water) and 200 KHz (shallow water, less than 600 ft.) models • If trolling with downriggers, use 010-10192-01 with speed wheel so you know your boat speed through the water for your fishing gear action and fish species targeting