Discover underwater insight with the Aurora 100M Portable Sonar Fish Finder. It provides essential readings for smarter, more confident fishing: water depth, approximate fish location, weed presence (short and tall), and the bottom contour including sand and pebbles. This compact, portable sonar is designed to accompany you across a range of fishing environments, making it easier to locate ideal spots, avoid snags, and plan your approach with precision.

Who is this for?

This compact sonar finder is ideal for anglers who fish from boats, offshore waters, lakes, ice, or seas. It’s also suitable for moving kayaks with speeds under 5 mph, giving coastal paddlers and boat users a practical tool to stay informed of what lies beneath. Whether you’re a beginner learning the basics or a seasoned angler refining your depth strategy, the Aurora 100M helps you read the water with fewer guesses and more data.

Real-world benefits

With the Aurora 100M, you gain a clearer picture of the underwater world before you cast. The depth readout covers a wide range from 3 ft (1 m) to 328 ft (100 m), displayed in both feet and meters to suit your preference. The 45° cone from the underwater transducer delivers reliable depth data and fish signals across a broad swath, helping you identify promising drop-offs, structure, and potential ambush points for fish. The device detects and displays weed density and bottom composition (sand and pebbles), so you can adjust your lure choice and line depth to minimize weed interference and maximize bite opportunities.

Key features at a glance

• Depth range: 3 ft (1 m) to 328 ft (100 m) with 45° cone coverage from the transducer
• Depth display options in feet or meters to match your preferred units
• Transducer includes a 25-foot wire and a removable float for versatile mounting
• Weed readout: detects short and tall weeds to help you avoid snags and adjust your lure depth
• Bottom readout shows sand and pebbles, giving you insight into the underwater substrate
• Five sensitivity levels to tailor performance to different water conditions
• Battery save mode to extend runtime
• Backlight mode for low-light visibility
• Fish and school alarm for quick bite reminders
• With fresh batteries, typical operation is 4–5 hours of continuous use; enabling battery save mode can extend this time

Different fishing scenarios

Whether you're chasing offshore pelagics, fishing from a calm lake, or probing icy waters, this sonar is built for adaptability. The device supports a range of fishing setups—from boat and shore to ice and kayak—providing reliable data to help you choose the best time and place to cast. The moving kayak use case is particularly valuable for scouting ahead and marking productive areas before you set anchor or drift.

What’s included and how it helps you get set up

The transducer comes with a 25-foot wire and a removable float, enabling flexible mounting options for boats, kayaks, or ice setups. The device offers multiple user-friendly modes (backlight for nighttime use, battery saver for longer trips) so you can tailor the experience to your environment and endurance needs. You’ll get quick, actionable data that translates into smarter decisions on where to fish, how deep to fish, and when to move to a new spot.