HDR 650 In-Dash Digital Depthsounder. The HDR 650 In-Dash Digital Depth Sounder gives you instant, reliable digital depth readings, and offers customizable bezel and face colors to complement italled gauges. This unit comes packed with a transom mount transducer. Bezel colors included White, Black and Chrome. Face plate colors included White and Black. Highlights. 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. Tracks Bottom Up to 70 MP. Specs. 1.25 LCD Display. 200kHz operating frequency. 600 ft depth. Deep/Shallow water alarms The HDR 650 In-Dash Digital Depth Sounder gives you instant, reliable digital depth readings, and of 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 Tracks Bottom Up to 70 MP Specs 1.25 LCD Display