To change the Speed Mode, you need to press the Speed Select button, which is the left triangular-like button at the top side of the remote control. The default Speed Mode upon start-up (including restarting the drone) is Speed 1. Press once to change from one speed to another. To determine which Speed Mode the drone is on, look at the lights around the Power Button. One light is for Speed 1, two lights are for Speed 2, and three lights for Speed 3.