FLEXIBLE ADJUSTMENT: Third Gear Manual Speed Adjustment, 10/15/30 Seconds / Lap, And 4 Angles Display--45°, 90°, 180°, 360°, You Can Adjust According To Various Demands.Our instructions are printed on the packing box, with a combination of Chinese and English on it. Please refer to the packing box for function and operation It's very simple to use. In addition, there are instructions in this listing‘s description.
