A Drone is a remote controlled aircraft that is used for pleasure and professionally. You can purchase all in one units or modular styles that can be enhanced or customized.
There are four different styles of drones on the market. They come in various sizes and signal ranges as well as prices.
The quadcopter is the most common drone. They are extremely well balanced and maintain power and speed. Although, these drones are used professionally many Pro Cameramen use Hexacopters or Octocopters for their reliability and balance.
Hexacopters are the next step up from quadcopters. They have higher speeds, carry more weight and use individual motors. Multiple engines increase their safety in case one engine kicks out the others will keep it in the air.
Octocopters are similar to the Hexacopter and are used to carry heavier equipment. They run along the same cost as the hexacopter but can be found being used in racing events as well.
Tricopters are for casual drone play. Many of these copters are better on battery life but cannot safely land if one engine fails. They are the least expensive of the drones and can be found at most toy and hobby stores.