The TFmini is a low cost LiDAR system from Benewake. This small and high reliable LiDAR system can be used in a variety of applications. The TFmini has dimensions of only 16 x 42mm and a operating range of 0,3 - 12m by only 0,12W power consumption.
Underlying are some technical details. The full specifications can be visit HERE.
In case of using the TFmini LiDAR with your UAV/Drone and in combination with your Pixhawk controller, you can visit a manual HERE, how to use them together.