The 340C is dual frequency configuration (50kHz, 45 deg and 200 kHz, 10 deg). Power output: 500 watts (RMS) 4000 watts (peak to peak). Depth: 1,500 feet. Water temperature, a round flasher-style display, and an A-scope display come standard. Also enabled with new CANet™ - a one-megabit Controller Area Network that allows users to connect their unit to one of the new GPSMAP® 200, 300, or 400-series chartplotter. This allows boaters to read sonar displays on chartplotters located elsewhere in the boat. Sunlight readable 256-color TFT (240 x 320 pixels) display.