ECHOMAP Plus 44cv is a great small boat combo with two kinds of sonar.A 4.3" diagonal color screen with keypad-operation, including a transom mount transducer that dials in two kinds of sonar—CHIRP traditional sonar plus CHIRP ClearVü scanning sonar.Key FeaturesClear Scanning Sonar Images: Garmin CHIRP traditional sonar and down-looking ClearVü scanning sonar are combined into one transducerCHIRP ClearVü scanning sonar gives you a nearly photographic image of whats below your boatTraditional sonar shows clear target separation and definition, because it puts even more energy onto the target than traditional sonarIncludes BlueChart g2 Charts: High-detail BlueChart g2 charts covering the coastal U.S. (east coast, west coast, Gulf of Mexico, U.S. and the Canadian side of the Great Lakes). Derived from official charts and private sources to provide navigational aids, spot soundings, depth contour, tides and currents and more.Use Quickdraw Contours to create your own charts: Instantly create personalized fishing maps on-screen with 1' contours. Tailor them to fit your needs. These are your maps — you own them. Keep the data to yourself, or share it with the Quickdraw Community on Garmin Connect.Share waypoints and routes with other ECHOMAP or STRIKER units.Easy to remove for security: When you're off the water, it's easy to keep your ECHOMAP Plus combo safe and secure because the cords plug directly into the mount; so it's easy to quickly install and remove your ECHOMAP PlusIncludes 4-pin transducer with 20' cable: CV20-TM is great shallow-water fishermen who want CHIRP traditional sonar and CHIRP ClearVü scanning sonarFrequency:Traditional CHIRP (77/200 kHz); ClearVü CHIRP 455 kHz (435 to 475 kHz) & 800 kHz (800 to 840 kHz)Transmit power: Traditional 500 W; ClearVü 500 WBeamwidth: Traditional (45/15); ClearVü (2.5 @ 455 kHz) & (1.6 @ 800 kHz)Maximum depth: Traditional: 2.300'; ClearVü: 250'What's in the BoxECHOMAP Plus 44cv with BlueChart g2 for U.S.CV20-TM transducerPower/data