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Compact rectangular unit with a 3.5 inch colour LCD screen and front-mounted buttons, dark plastic casing

WUQ

WUQ FF688C 3.5" Color LCD Fish Finder Marine Electronic

SKU CH-FNFN-QMCEG

A 3.5" sunlight-readable colour LCD fish finder with dual 200/83 kHz sonar, 0.6–80 m depth range and multi-language menus

  • TypeMarine Receiver
  • 5" 18-bit TFT LCD readable in sunlight
  • Dual 200/83 kHz sonar reaches 80 m depth
  • Multi-language menu with 18 interface options
  • 800 W peak power with 100 W RMS output
  • Auto-zoom tracking plus manual zoom and stop-chart

3.5″ Color LCD Fish Finder

The WUQ FF688C is a portable marine receiver built for anglers who need real-time depth, bottom contour and water temperature data on inland or coastal waters. Its 3.5″ 18-bit TFT sunlight-readable display shows V320 × H240 resolution with white LED front lighting for clear visibility in bright conditions. The unit operates on DC input power and includes a battery strength indicator for extended sessions on the water.

Dual Beam Sonar Upgrade

This model replaces basic single-frequency sounders by adding 200KHz/83KHz dual beam sonar, giving 800 watts maximum output power and 100 watts RMS for detection from 0.6m to 80m (2ft to 240ft) in 1/10th precision. The jump is worth it when you need to distinguish grass, sand or rock bottoms, suppress weed interference in lakes, and identify big versus small fish icons with audible alarms set between 3ft and 99ft. Auto zoom bottom tracking and quick manual zoom let you focus on the strike zone instantly.

Transom Mount Installation

Mounting the transducer on the transom or hull is straightforward for most small craft, and the multi-language menu (English, Russian, French, Chinese, Japanese, Finnish, Polish, German, Italian, Spanish, Dutch, Korean, Swedish, Greek, Danish) simplifies first-time setup. The main caution is that the control buttons are not waterproof, so the head unit must be sheltered from direct spray or rain. Users should also verify the DC voltage matches their boat supply before wiring to avoid power issues.

Highlights

  • 5" 18-bit TFT LCD readable in sunlight
  • Dual 200/83 kHz sonar reaches 80 m depth
  • Multi-language menu with 18 interface options
  • 800 W peak power with 100 W RMS output
  • Auto-zoom tracking plus manual zoom and stop-chart

Specifications

TypeMarine Receiver

Questions about this item

What size cut-out and power source does the 3.5 inch display unit need?

The unit fits a standard 3.5 inch panel opening and runs on DC input power; connect the supplied cables to a marine battery and secure the bracket with the included hardware

How do I install the dual-beam transducer and which step is often missed?

Mount the transducer on the transom or through the hull, run its cable to the display, then select 200 kHz or 83 kHz in the menu; the step often missed is setting the depth range to match the water you are fishing

What ongoing care does the sonar module require and what part may need replacement?

Rinse the transducer with fresh water after each trip, check the cable for cuts, and replace the transducer if the 200 kHz or 83 kHz signal drops out or the bottom reading becomes unreliable

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