The Deeper Chirp 4 Plus Smart Sonar is a castable fish finder that brings advanced sonar capabilities to anglers fishing from the bank, pier, or kayak. It uses AI-powered fish detection to help identify targets, and provides personal bottom hardness and weed maps in both 2D and 3D views. The unit employs 3-frequency CHIRP technology to deliver detailed imaging across a range of depths and conditions, making it one of the most advanced castable sonar devices available.