Drones incorporate various safety features to prevent accidents and enhance flight safety. Some common safety features include:

1. **Return-to-Home (RTH)**: Many drones are equipped with an automated RTH function that triggers when the signal between the controller and the drone is lost or weak. The drone will automatically fly back to its takeoff point or a pre-programmed home location using GPS coordinates.

2. **Geofencing**: Geofencing technology creates virtual boundaries around designated areas, such as airports, government buildings, and other restricted zones. Drones equipped with geofencing features will automatically prevent flight or restrict altitude when entering restricted airspace.

3. **Obstacle Avoidance**: Advanced drones may incorporate obstacle detection and avoidance systems using sensors such as cameras, ultrasonic sensors, lidar, or infrared sensors. These systems detect obstacles in the drone's flight path and automatically adjust the flight trajectory to avoid collisions.

4. **Low Battery Return-to-Home**: Drones may initiate an RTH procedure when the battery level falls below a certain threshold to ensure they return safely before the battery is depleted.

5. **Altitude Limits**: Some drones have built-in altitude limits to prevent them from flying too high, which could pose a risk to manned aircraft or violate airspace regulations.

6. **Safety Lights**: Drones often feature LED lights or other visual indicators to improve visibility during flight, especially in low-light conditions or when operating in airspace with other aircraft.

7. **Emergency Landing**: In the event of a critical battery failure or other emergency, some drones are programmed to perform an emergency landing in the nearest safe area rather than continuing flight or falling from the sky.

8. **Manual Override**: Pilots can often regain control of the drone manually even during emergency situations by switching to manual mode or using override commands.

By incorporating these safety features, drones can mitigate the risk of accidents and enhance overall flight safety for both operators and bystanders. However, it's essential for drone operators to be familiar with these features and adhere to best practices for safe and responsible flying.