More Power (and Depth and Speed) to YouMark-5x DSI fishfinders transmit 2,400W peak-to-peak/300W RMS power with recently-tested depths to 200 ft./61 m, and impressive bottom readings at boat speeds up to 40 mph. Optimum imaging speed of 8 mph and under.Advanced TransducerSlim new low-profile, high-speed, transom-mount, 455/800 kHz Skimmer DSI imaging transducer with exclusive down-looking crystal and built-in temp sensor, and trolling motor-mount bracket option. Maximized ViewingHigh-resolution 5 in./12.7 cm, 480x480 pixel Film, SuperTwist 16-level gray scale display maximizes visibility and target detail that"s enhanced by direct sunlight. Adjustable, bright-white LED backlit screen and keypad for night or low-light angling. Full Automatic or ManualMark-5x DSI is so advanced it"s easy to use, with automatic fine-tuning for the best sonar imaging picture possible after power-up. Advanced User Mode for full manual control of settings. TrackBack Into Sonar HistoryEnjoy immediate scroll-back of imaging sonar history to review covered water and pinpoint spots (saves time and fuel trying to re-trace your path). Easy to Install and UseUnique new keypad and quick-release bracket design offers easy installation, plus one-hand viewing adjustment, operation at-speed, and removal/reinstall.Interface BeautySimplified menu with text and icons for faster and easier selections.. Product : LOWRANCE MARK-5X DSI FISHFINDER MONO. Manufacturer : LOWRANCE. Manufacturer Part No : 000-10233-001