Benewake TFmini Micro Lidar (12m)This is the worlds smallest and cheapest lidar units. Using the time of flight ranging principle, the TFmini is able to achieve 100Hz range updates, with an accuracy of about 5mm (indoors) with a range of up to 12m indoors, or about 8m outdoors. All this in a package similar to the size of an AA battery with a weight of just 10g. Essentially this is the same size and similar cost as many ultrasonic rangefinders, but has significantly better