The Garmin GT20-TM is designed for anglers who need a classic scanning sonar with CHIRP ClearVü capability (photographic bottom imaging). It can display the shape of fish as well as clear images of objects, structures, and fish passing under your boat. The sensor comes with motor mounts, rollers, and installation instructions. 

• Frequency: Classic 77/200, ClearVü CHIRP 455 kHz (435-475 kHz) & 800kHz (800-840 kHz)
• Power: Classic 500 W, ClearVü 500 W
• Beam range: Classic 45/15, ClearVü 2.5 @ 455 kHz & 1.6 @ 800 kHz
• Maximum depth: Classic 579 m, ClearVü 229 m
• Number of pins: 4
• Cable length: 6.1m
• Depth and temperature indicators