This small Lidar sensor is a carrier/breakout board for ST’s VL53L0X laser-ranging sensor, which measures the range to a target object up to 2 m away. The VL53L0X uses time-of-flight measurements of infrared pulses for ranging, allowing it to give accurate results independent of the target’s color and surface.
Distance measurements can be read through a digital I²C interface. The board has a 2.8 V linear regulator and integrated level-shifters that allow it to work over an input voltage range of 2.6 V to 5.5 V, and the 0.1″ pin spacing makes it easy to use with standard solderless breadboards and 0.1″ perfboards.
This seems to be a brilliant product (if it works), considering its incredibly small size, it's stated accuracy, and quite a large range - upto 6 feet !
HOWEVER - good luck in trying to make it work, since the documentation does not exist. Even if you are going to use the provided libraries & link into C code, this library is very hard to understand.