The Raymarine RV-300 Plastic All-In-One Through Hull Transducer lets you easily identify structures and locate fish with the life-like clarity of RealVision 3D™ sonar. The RV-300 is a 4-channel, Wide Spectrum CHIRP transducer with DownVision™, SideVision™, high frequency CHIRP fish targeting and RealVision 3D™ sonar inside. The transducer also has a built-in attitude and heading reference system (AHRS) that stabilizes the sonar imagery, compensating automatically for vessel motion. You'll enjoy crystal-clear imagery even in waves, swells, and when maneuvering. The RV-300 also has a built-in fast response water temperature sensor for quick, accurate readings. The RV-300 features a rugged plastic through hull body suitable for fiberglass, steel or aluminum hulls. The RealVision 3D™ transducer elements are arranged with a 0° offset for boats with flat bottoms. The low-profile design slips effortlessly through the water without causing drag or cavitation. The near-flush RV-300 works great on trailered boats too and with no fairing block to cut, installation is a breeze.