Designed for salt water or downrigger tracking. Same great features of the X-125 with: 5" diagonal, 480V x 480H pixel film SuperTwist display, "flasher mode", speed and water temperature included. Includes dual frequency 50//200 kHz skimmer transducer (4000 watts peak-to-peak power for depths to 1,700') with built-in temperature sensor (HS-50/200-DX) and speed sensor (SP-X).