A quadcopter is a type of drone that is powered by four rotors. It is designed to fly by using the lift generated from these rotors, which are typically arranged in a square configuration. Quadcopter technology is commonly used for various applications, including aerial photography, surveillance, and recreational flying. These devices are controlled remotely, often using a handheld transmitter or a smartphone app. Many quadcopters are equipped with cameras and sensors, allowing them to capture images and gather data from the air. Their stability and ease of use make them popular among hobbyists and professionals alike.