Shipping Q4 2026

FT Depth Dongle

A castable sonar ball that turns your phone into a 100-foot fish finder. Tow it, cast it, map it.

$199 Pre-Order Price

What it does

🎯

Castable Sonar

Tie it to your line. Cast 150 feet. Real-time depth on your phone.

👁

2D + 3D Mapping

Builds bathymetric maps as you troll. Saves to your phone's map library.

🌊

100ft Depth

Reads structure, thermocline, fish arches to 100 feet.

🔗

Bluetooth to App

Phone becomes your sonar screen. No extra unit needed.

🔋

8-Hour Battery

Full day on a single charge. Internal lithium.

🛡

Floatable & Towable

Snag-resistant shell. Survives hung bottom.

Technical specifications

Depth Range
2 — 100 ft
Frequency
675 kHz dual beam
Connection
Bluetooth 5.3
Range
50m wireless
Battery
8 hours / USB-C charge
Size
68 mm sphere
Weight
124 g
Use
Cast, troll, kayak, ice

Built for the moments that matter

Shore Scouting

No boat? Cast the dongle into the break. Find the drop-off before your first lure wet.

Kayak Mapping

Troll all day, come home with a personal contour map of your honey hole.

Ice Fishing

Drop through the hole. 3D view of every fish under the ice.

Join the waitlist

Be first to order when pre-sales open. Early bird pricing locked for the first 500.