Humminbird HDR650 Digital Depth Finder. This Humminbird HDR 650 Digital Depth Finder comes packed with a transom mount transducer. Specifications for Humminbird HDR 650 Digital Depth Sounder: Display Size: 1.25" diagonal Display Type: LCD Single Beam: Sonar Coverage: 200 kHz / 20 at -10db: Backlight: Yes Waterproof: Yes Features of Humminbird HDR 650 In-Dash Digital Depth Sounder: Easy to Install into Existing 2 1/8 inch gauge opening Completely waterproof Easy to read large backlit LCD display for use at night Wires to Ignition Switch for Auto Power On Shallow and Deep Depth Alarms Reads in Feet Meters and Fathoms Tracks Bottom Up to 70 MP Package Contents: Humminbird HDR 650 In Dash Digital Depth Sounder 4078601 Humminbird 4078601: HDR650 Digital Depth Finder