onTrak Tractor GPS (original)onTrak is a tractor GPS system above all others. onTrak ensures you drive in parallel lines to cover your field area with minimal skips and overlaps. There are 2 parts to the system. The revolutionary combined GPS receiver and light bar; and the free iOS or Android app which you run on your tablet or phone in the cab. The ORIGINAL onTrak system is perfect for low medium accuracy applications where free satellite signal is sufficient. Includes USB
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