The Hummingbird LCR400 Portable Kayak Fish Finder is a handheld system with a transducer, designed for fishing in depths up to 600 feet. It features a monochrome display, depth indicator, fish ID, depth alarm, and back light for enhanced visibility. Powered by batteries, this fish finder includes mounting hardware for easy installation on a kayak or boat. With sonar sensors and a compact design measuring 6 inches in length, height, and width, the Humminbird LCR400 is a reliable and versatile tool for anglers looking to find fish in various water conditions.