The Furuno R109LH is a urethane thru-hull CHIRP transducer built on the Airmar R109 housing platform, designed for vessels 40 feet and larger constructed of fiberglass, wood, or metal. Operating across two continuous frequency bands — 38–75 kHz and 130–210 kHz — it works with Furuno Free Synthesizer (FFS) technology to let anglers tune to the exact frequency that best suits the target species or water depth. Whether you're working structure in 200 feet of water with a tight high-frequency beam or searching the water column in deep blue water with a wider low-frequency beam, the R109LH adapts to the task. This model ships without a connector and includes a high-speed fairing block kit.

Specifications:

• Housing style: Airmar R109 urethane thru-hull
• Frequency range: 38–75 kHz (low) and 130–210 kHz (high)
• Power output: 3 kW low frequency, 2 kW high frequency
• Furuno Free Synthesizer (FFS) compatible — select any two frequencies within each band
• Beam angle (low frequency): 19° to 10° port-starboard; 10° to 5° fore-aft
• Beam angle (high frequency): 8° to 4°
• Includes high-performance fairing block kit for high-speed operation
• Temperature sensor included
• No connector (bare cable)
• Designed for boats 40 ft and above
• Compatible hull materials: fiberglass, wood, or metal

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

⚠️ California Prop 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.