Sonar Fish Finder Pro — 100m Echo Sounder with Alarm
- Locate fish in 15 minutesSee depth, structure, and schools before your first cast
- Phone-connected live displayReal-time sonar on your screen — no dedicated unit needed
- 30-day returnsNo questions asked — prepaid label included
- 1-year warrantyAny defect, we repair or replace it. Zero risk.
What you'll love
- Locates fish fast — sonar transducer reads depth, water temperature, and fish position in real time so you're never guessing where to cast
- 100m depth range — covers shallow ponds to deep reservoirs; ideal for lake, river, and coastal fishing
- Shows on built-in sonar display — clear readings that are easy to interpret even in bright sunlight
- 45° sonar cone — wide coverage maps a large area of the water column with each cast
- Alarm function — audible fish alert tells you when fish are below without you staring at the screen
- Works everywhere — freshwater, saltwater, brackish water, ice fishing; rugged transducer handles all environments
Specs & dimensions
| Max depth | 100m |
| Sonar coverage | 45° cone angle |
| Display | Built-In Sonar Display |
| Connectivity | Wired transducer |
| Alarm | Audible fish alert, shallow water alarm |
| Power | AA batteries or USB rechargeable (by model) |
| Operating temp | -20°C to 60°C |
| Water resistance | Transducer: IPX7 waterproof |
What's in the box
- 1 × Fish finder unit / display
- 1 × Sonar transducer with cable
- 1 × Mounting bracket (if applicable)
- 1 × User manual
Care & storage
- Rinse the transducer with fresh water after every saltwater use
- Store the display unit away from extreme heat and direct sunlight
- Remove batteries if storing for more than 30 days to prevent corrosion
- Wind cable loosely — never coil tightly around the transducer
- Wipe the display screen with a soft, dry cloth only
Shipping & returns
Free shipping on all U.S. orders over $50. Orders ship within 1–2 business days from our U.S. warehouse. 30-day hassle-free returns — contact us and we'll send a prepaid label.
What is the maximum depth this fish finder can detect?
Maximum rated depth is 100m. Performance can vary based on water clarity and bottom composition — turbid water or heavy weeds may reduce effective range by 20–30%. The depth rating assumes clean, open water conditions.
Does it work in saltwater?
Yes, the transducer is designed for both fresh and saltwater. Always rinse with fresh water after each saltwater session to prevent mineral buildup on the transducer face, which can reduce sonar accuracy over time.
How long does the battery last?
Battery life depends on usage and battery type. With quality alkaline AA batteries, expect 10–15 hours of continuous use. Rechargeable Li-ion models offer 8–12 hours per charge. Turn off the backlight to extend battery life by up to 40%.
Can I use this from shore or only from a boat?
Both. Cast-style fish finders (with a transducer that floats on the surface) work from shore, dock, kayak, or boat. Transom-mount or suction-cup models are best used from a boat or kayak. The wireless/WiFi models are the most versatile — cast the transducer from anywhere.
Is the display readable in direct sunlight?
The smartphone display brightness depends on your phone settings. Set your screen to max brightness in the app, and use a phone with an OLED display for best outdoor readability.
Locates fish fast
100m depth range — covers shallow ponds to deep reservoirs; ideal for lake, river, and coastal fishing
- Shows on built-in sonar display — clear readings that are easy to interpret even in bright sunlight
- Alarm function — audible fish alert tells you when fish are below without you staring at the screen
- Works everywhere — freshwater, saltwater, brackish water, ice fishing; rugged transducer handles all environments
Alarm function — audible fish alert tells you when fish are be
Works everywhere — freshwater, saltwater, brackish water, ice fishing; rugged transducer handles all environments
- Rinse the transducer with fresh water after every saltwater use
- Store the display unit away from extreme heat and direct sunlight
- Remove batteries if storing for more than 30 days to prevent corrosion
Store the display unit away from extreme heat and direct sunli
Remove batteries if storing for more than 30 days to prevent corrosion
- Wind cable loosely — never coil tightly around the transducer
- Wipe the display screen with a soft, dry cloth only
Ships in 24h
Orders placed before 2pm EST ship same business day. Free tracked shipping on U.S. orders over $50.
30-Day Returns
Not the right fit? Return it hassle-free within 30 days. No questions asked. We send a prepaid label.
1-Year Warranty
Every product we sell is covered. Defects, broken components — we repair or replace. Zero risk.
Customer Reviews
Frequently Asked Questions
What is the maximum depth this unit can detect?
Maximum rated depth is listed in the specs. Actual performance varies by water clarity and bottom type — turbid or weedy water may reduce effective range by 20–30% compared to clear water.
Does it work in saltwater?
Yes. The transducer is rated for fresh and saltwater. Rinse the transducer face with fresh water after each saltwater session to prevent mineral deposit buildup that can reduce sonar accuracy.
How long does the battery last?
With quality alkaline batteries: 10–15 hours. Rechargeable Li-ion models: 8–12 hours per charge. Disabling the backlight extends battery life by up to 40%.
Can I use this from shore, not just a boat?
Yes — wireless cast-and-float models work from any position: dock, shore, kayak, or boat. Transom-mount models are best suited for boats. Check your specific model type.
Is the screen readable in bright sunlight?
LCD models feature a high-brightness backlight and anti-glare coating. In very bright sun, shade the display slightly for best readability. Smartphone-connected models depend on your phone's screen brightness.
Customers Also Bought
220° Wide-Angle Underwater Camera — 1...
$116.00
360° Bait Dispenser for RC Bait Boat ...
$333.00
4-Piece Travel Rod — FUJI Guides, Hea...
$121.00
5-Layer Waterproof Waders — Stocking ...
$359.00
Adjustable Fishing Chair — Carbon Ste...
$565.00
Adjustable Lift Fishing Chair — Carbo...
$552.00
All-Terrain Fishing Chair — Aluminum ...
$438.00
Backrest Fishing Chair — Folding Box ...
$1,405.00