Garmin USA Echo 301C Portable Fishfinder Exclusive advanced HD-ID sonar with transducer 3.5-inch diagonal color display Transmit power (RMS)/(Peak-To-Peak): 300 W/2,400 W Frequency: 77/200 kHz included (supports 50/200 kHz) Quick-release tilt/swivel mount and transom/trolling motor transducer mounting kit included