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The TrailMark is the ultimate solution for marking frequent & accurate race notes while in motion. Designed specifically for use with Lowrance off-road GPS units, this USB interface allows the use of a programmable HID USB keypad with the NMEA200 network, allowing you to instantly mark notes and waypoints on the GPS. With the TrailMark, you can improve your race times and avoid costly mistakes by ensuring accurate and consistent race notes. Don't settle for missing or incorrectly marked race notes. Get the TrailMark and take your prerunning to the next level.