After Edward Snowdens revelations people have worried about privacy. Many believes random number generators in openssl and other projects corrupted from NSA.
OneRNG generates roughly 320kbits of entropy per second, if you need more than that you can connect multiple OneRNG devices to the same machine
OneRNG has two random sources – the first is an avalanche diode that generates ‘quantum noise’. OneRNG sample this data in the analog domain which generates ~7 bits of entropy per byte. The second is an RF receiver that operates in and around the 2.4GHz wifi band – it runs a detuned receiver that frequency hops at random times to random channels and returns the least significant bit from the (failed) demodulator -this returns significantly closer to 8 bits per byte of entropy data.