LIST PRICE: $148.99 The HDR600 mounts easily in standard 2 1/8 inch gauge holes. The HDR600 is completely waterproof with an easy to read large, backlit LCD display. Features 600' Depth Capability, Deep Alarm, Shallow Alarm, Keel Offset Units of Measure (Feet, Meters and Fathoms) Specifications Depth Capability: 600 feet Operating Frequency: 200 kHz Transducer (Standard): XHS-6-16 with 20 foot cable Transducer Area of Coverage: 16 degrees @ -10db Power Requirement: 10 - 16 VDC Display Type: Liquid Crystal Display Unit Size: 2.42 inches Dia. x 4.75 inches Made in U.S.A. Single Beam Sonar: Single Beam sonar is optimized to give you a detailed view. The single beam has a narrowly focused beam to depicit the bottom, structure and weeds and cover where fish congregate.