Garmin's GT8HW-IH transducer is ideal for bass boaters who want to install a transducer inside a fiberglass hull and not on the transom where cavitation could cause issues. It requires a flat section in the hull to be mounted and is excellent for boats traveling at high speeds that want to maintain accurate depth readings. The 8-pin transducer features high-wide CHIRP traditional sonar (145-230 kHz) and has a power rating of 250W. It can be used in conjunction with a GT30-TM transducer and an adapter cable so you can maintain depth at high speeds and scanning capabilities at trolling speeds. Supports 0° - 6° deadrise. Maximum depth of 800'. Provides depth data only Durable, marine-grade construction | Garmin GT8HW-IH In-Hull Transducer