Another great feature is you can use your fingertip to chart a flight path. You do this by dragging your finger across the video image from the drone that is shown by its app on your smartphone. Then, the drone will automatically fly the flight path you have chosen. You can also teach the drone to respond to voice commands that you record with your smartphone.
It is important to understand the warning about wind because wind is the most likely cause of serious problems with these drones. The drones in this category do not fly well in the wind because their motors are not strong enough. It is easy to lose them in the wind, so do yourself a favor and do not attempt to fly them, especially up high, if there is even the slightest wind outside. It would be better to fly them indoors if it is a windy day. 
DJI models currently dominate our top picks, and there's a good reason for that. The company is simply a few steps ahead of its competition right now, and has a product catalog with models at various price points, which take up a good number of the slots in our top ten. It made a huge splash with its iconic Phantom series, and now makes the best small drones we've tested in the form of the Mavic series.
For example, OPTI has a built-in Optiflow Sensor (a downward facing sensor), which functions by picking out the patterns on the ground to ensure that the drone maintains a straight position.  ATTI, conversely, works a bit differently. With the ATTI, the drone employs other techniques apart from the external sensors to keep the drone in the right orientation and altitude. Thus, the drone can hover in place, or drift slightly around with the wind serving as a push. You will also find a GPS in some drones, and they help the drone to maintain coordinated and precise flights and landings.
Generally speaking, drones that cost less than $100 bucks aren’t worth your time. They’re flimsy, they lack advanced features, and they’re almost always squirrely as hell in the air. But Tello is different. Despite the fact that it retails for only $99, it boasts a boatload of high-end features and functionality. Under the hood you’ll find a 14-core Intel vision processing chip, flight stabilization tech from DJI, a 5 megapixel camera capable of shooting 720p HD video, and a battery that gets you 13 minutes of flight time.

best drones under 100 amazon

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