Includes advanced 77/200 kHz HD-ID™ and Garmin DownV with CHIRP technology all-in-one transducer for a nearly photographic view under your boat. Supports optional 50/200 kHz transducer and is CHIRP compatible. Transmit power: 1kW RMS (8000W peak-to-peak); CHIRP: 600W RMS (4800W peak to peak). Also supports GCV™ 10 black box sonar that adds both DownV and Garmin SideV™ scanning sonar with CHIRP technology (sold separately). Built-in 10 Hz GPS/GLONASS receiver updates your position and heading 10 times per second. Compatible with LakeV™ HD, LakeV HD Ultra, BlueChart® g2 and BlueChart g2 Vision™ Sonar-recording capability coordinates the timing of the sonar return with your boat’s position and saves digital information. Wirelessly connect to Apple® iOS device for BlueChart® Mobile.