Perfect for coastal and offshore fishermen who want traditional sonar and CHIRP ClearVu scanning sonar, the Garmin GT21-TM Transom-Mount Transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat. The CHIRP ClearVu element has a power rating of 500W and operating frequencies of 260/455 kHz. The traditional sonar has a power rating of 600W and operating frequencies of 50/200 kHz. It also includes a built-in fast response temperature sensor. The GT21-TM includes an 8-pin transducer with mounting hardware and installation instructions. SpecificationsFrequency: Traditional 50/200 kHz; ClearVu CHIRP 260 kHz (245-275 kHz) and 455 kHz (445-465 kHz)Power: Traditional 600W; ClearVu 500WTraditional Beamwidth: 40°/10°ClearVu: 2.0°x51° @ 260 kHz and 1.4°x29° @ 455 kHzMaximum Depth: 1, 500' Traditional; 1, 000' ClearVuCable Length: 30'Number of Pins: 8Supported Deadrise/Transom Angles: 0°-70° transom Traditional sonar with 600W power and 50/200 kHz frequencies Includes a built-in fast response temperature sensor 8-pin transducer with mounting hardware | GT21-TM Transom-Mount Transducer, 8-Pin