The B275LHW is a 1 kW bronze thru-hull CHIRP transducer with a built-in temperature sensor delivering exceptional broadband performance. It operates across low frequencies (42–65 kHz) with a 25° x 16° beam and high frequencies (150–250 kHz) with a constant wide 25° beam. The "W" stands for wide, offering over six times the coverage of traditional high-frequency transducers for superior target separation and bottom tracking.

Traditional marine Fish Finders operate at discrete frequencies such as 50 kHz and 200 kHz, use relatively short-duration transmit pulses, and use narrowband sonar transducers. In contrast, CHIRP (Compressed High-Intensity Radar Pulse) uses a precise sweep pattern of many frequencies within a long-duration transmit pulse from a broadband transducer. The equivalent sound energy transmitted into the water is 10 to 1000 times greater than a conventional marine Fish Finder. The echo energy returning to the transducer is likewise superior to that generated by a conventional transducer. The combination of CHIRP, a broadband transducer, and Furuno’s superior Digital Signal Processing, results in dramatically increased fish and bottom detection : TruEcho CHIRP™.

The low-frequency array operates between 42 and 65 kHz, delivering strong deep-water penetration and reliable bottom tracking down to 914 m (3000 ft). Combined with 1 kW of CHIRP power, the transducer provides excellent bottom discrimination and fish detection even in challenging conditions.

The bronze thru-hull housing with high-performance fairing block ensures optimal acoustic performance and stable readings at vessel speeds exceeding 30 knots. Integrated depth and fast-response temperature sensing provide additional environmental data essential for fishing operations.