The Vexilar SonarPhone SP300 is a portable WiFi fishfinder package that sends sonar data to a smartphone or tablet through the free SonarPhone app. The bundle includes the T-BOX transducer, 12V battery, charger, and carry case, so it can be used from a small boat, dock, kayak, or ice-fishing location without installing a fixed display.

The single-beam 200kHz sonar reaches up to 240 feet, while the dedicated WiFi hotspot provides up to 300 feet of range to the connected device. The main advantage over a basic handheld fishfinder is screen flexibility: use the phone or tablet already in your kit. The trade-off is dependence on that device and app. This package is portable sonar, not a chartplotter, NMEA 2000 instrument, or deep-water sounder.

Key Features

- T-BOX transducer included – Supplies the sonar sensor for the portable system.
- 200kHz single-beam sonar – Provides conventional depth and fishfinding information.
- WiFi range up to 300 feet – Sends sonar data to a smartphone or tablet at useful distance.
- SonarPhone app support – Provides the viewing interface through a free app download.
- 12V battery, charger, and carry case included – Makes the system portable and ready to use.

Who Is This For?

This portable WiFi fishfinder suits kayak anglers, small-boat fishermen, dock users, and ice fishermen who prefer a phone or tablet display. It is not ideal for offshore navigation, a permanent helm, or buyers wanting charts, GPS, or network sonar integration.

Compatibility

Confirmed components include the T-BOX transducer, 12V battery, charger, carry case, SonarPhone app, and WiFi connection to a smartphone or tablet. The supplied information does not identify NMEA 2000, NMEA 0183, radar, autopilot, Garmin, Raymarine, or third-party display compatibility. No named incompatible system was provided.

Technical Specifications

- Brand: Vexilar
- Model: SonarPhone SP300
- Connection: WiFi hotspot to smartphone or tablet
- Bundle contents: T-BOX transducer, 12V battery, charger, carry case
- Sonar frequency: 200kHz single beam
- WiFi range: Up to 300 feet
- Depth: Up to 240 feet
- App: SonarPhone, free download
- Power: 12V battery system
- Warranty: 1-year limited warranty

Warranty & Support

Vexilar provides a 1-year limited warranty. The supplied specifications do not state warranty exclusions or service procedures.

The SP300 is the flexible portable fishfinder for anglers who already carry a phone or tablet and want a larger screen than a handheld unit can provide. Its trade-off is app and WiFi dependence, plus single-beam sonar. Choose it for easy temporary setups, not for a permanent marine electronics network or advanced scanning sonar.