Garmin Fishfinder 90 fish finder

Fishfinder 90 also offers Ultrascroll™, which refreshes the screen with lightning speed so you always see the most up-to-date information. You can manually adjust the gain or set to Auto Gain, which adjusts the level of detail you see automatically.

Other features:
- Automatic display re-scaling on range change (no more vertical lines with range changes)
- Power output: 100 watts (RMS), 800 watts (peak to peak).
- See-Thru® technology: shows weak and strong returns simultaneously.
- Unit remembers user settings when it is turned off.
- Whiteline shows you how thick the bottom is.
- 2X and 4X automatic and manual zoom.
- Alarms for fish size, shallow water, deep water, low battery.
- Battery voltage indicator.