The Garmin GT20-TM packs DownVü imaging and traditional sonar into one transom-mount transducer, delivering crisp detail on fish, structure, and bottom composition directly beneath the hull. CHIRP DownVü runs at 455/800 kHz for high-definition down-looking images, while traditional sonar covers 77/200 kHz for proven depth performance reaching up to 1,900 feet. A built-in fast-response temperature sensor and 20-foot cable come included, and both a transom mount and trolling motor mount are in the box — making installation straightforward on a broad range of Garmin-compatible chartplotters and fishfinders.

Specifications:

• Transducer type: Transom mount, DownVü + Traditional
• Power rating: 500 W (DownVü and Traditional)
• Traditional operating frequency: 77/200 kHz
• DownVü operating frequency: CHIRP 455/800 kHz
• Maximum depth (traditional): 1,900 ft
• Maximum depth (DownVü): 750 ft
• Transom angle range: 0 to 70 degrees
• Cable length: 20 ft
• Connector: 4-pin
• Built-in fast-response temperature sensor: Yes
• Included mounts: Transom mount and trolling motor mount
• Installation instructions included

⚠️ California Prop 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.