On the other hand, ATTI is a partially different tool, whereby the quadcopter uses other techniques and not necessarily external sensors to firmly hold the drone in correct altitude and orientation. ATTI allows the drone to hover in place, as well as to gently drift around while being pushed by the wind. Some drones also have GPS which offers great precision and coordination during flight.
Altitude Hold allows a drone to maintain a consistent altitude by analyzing the pressure data further provided by a drone’s barometric pressure sensor. If a drone has an ultrasonic sensor, this is also used with Altitude Hold. This feature ensures even a small drone with camera will be able to hold itself in place while you snap some shots or record a video.
The Tello is a brand new quadcopter from the world’s biggest drone company, and it retails for only $99 USD. Technically it’s a joint venture between DJI and Rize, but the important thing is that you’re getting a high-quality product for dirt cheap. A 5 Megapixel camera, 8 dimensional flips, a “throw and go” flight mode, and HD video can all be yours today – learn more by reading our full review here.

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.

If you are a beginner just learning to fly with these cheaper drones, take your time to learn the controls by flying in a safe area that is a wide open space, with no wind, and no obstacles. At first, fly low to the ground until you can maneuver your drone correctly. Practice flying on a single battery charge and then let the drone cool down for ten minutes before flying more. 
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