The Airmar B285M is a single-band CHIRP thru-hull transducer operating across the medium frequency range of 85–135 kHz, delivering up to 1,500 feet of depth penetration with sharp target separation and bottom detail. A built-in high-performance fairing sustains broadband accuracy at speeds exceeding 30 knots, and the bronze housing suits fiberglass or wood hulls in both planing and displacement configurations. Single-channel sounder setups benefit from the ability to preset 85 kHz and 135 kHz for quick toggling between wide and narrow beam angles. Note: a Mix & Match cable is required and sold separately.

Specifications:

• Frequency range: 85–135 kHz (medium band CHIRP)
• Total bandwidth: 50 kHz
• Beamwidth: 16° at 85 kHz / 11° at 135 kHz
• Power output: 1 kW
• Maximum depth: 457 m (1,500 ft)
• Covers popular fishing frequencies of 88 kHz and 107 kHz, plus all frequencies within the bandwidth
• Depth sensor and fast-response water-temperature sensor included
• Housing material: bronze — suitable for fiberglass or wood hulls
• Hull compatibility: planing or displacement hulls
• Recommended minimum boat size: 8 m (25 ft)
• High-performance fairing included for broadband performance at speeds over 30 knots (34 mph)
• Features exclusive Xducer ID® technology
• Also available as transom-mount (TM185M), thru-hull (B175M), and in-hull (M135M) models
• Mix & Match cable required (not included)

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