Raymarine Pack of RV-220 RealVision 3D Bronze Through Hull Transducers Port And Starboard 20Deg 2x2m Y-cable and 8m Extension Cable. The RV-220 system is a 4-channel Wide Spectrum CHIRP transducer system w/ DownVision SideVision high frequency CHIRP fish targeting and RealVision 3D sonar inside. The transducer system has a built-in attitude and heading reference system (AHRS) that stabilizes the sonar imagery automatically compensating for vessel motion. You'll enjoy crystal-clear imagery in waves swells and while maneuvering. The RV-220 system also has a built-in fast response water temperature sensor for quick accurate readings. Raymarine's RV-220 Bronze Through Hull Transducer system pack contains a pair of RealVision 3D transducers w/ internal offset to accommodate hull deadrise angles from 13deg. to 20deg. This completely eliminates the need for fairing blocks. The low-profile design slips effortlessly through the water w/out causing drag or cavitation. The near-flush RV-220 system works great on trailered boats too. The RV-220 system features rugged cast-bronze through hull bodies suitable for fiberglass or wooden hulls. One transducer transmits and receives to port and downwards the other to starboard and downwards ensuring a full 180deg. of underwater coverage even on boats w/ deep keels or other underwater protrusions. Each transducer features a 2-meter pigtail joining y-cable and 8-meter extension cable resulting in an overall cable length of 10 meters (33 feet.) Specifications for Raymarine Pack of RV-220 RealVision 3D Bronze Through Hull Transducers Port And Starboard 20Deg.: Manufacturer: Raymarine Color: Bronze Beam Angle: 20 degrees Hull Type: Thru-Hull Package Contents: Raymarine Pack of RV-220 RealVision 3D Bronze Through Hull Transducers Port And Starboard 20Deg. Raymarine T70319: Pack of RV-220 RealVision 3D Bronze Through Hull Transducers Port And Starboard 20Deg 2x2m Y-cable and 8m Extension Cable