It is based on the " 'Quantum Random Bit Generator' (QRBG121), which is a fast non-deterministic random bit (number) generator whose randomness relies on intrinsic randomness of the quantum physical process of photonic emission in semiconductors and subsequent detection by photoelectric effect".
Why is this good? well because software cannot generate real random numbers, they just can generate pseudo random numbers.
If interested there is a QRBG Service that you can access it online. Today there are C++ libraries, MathLab toolbox and CLI access. They are also planning to support web access.