For sure this fuzz is not a versatile effect. You have (nearly) one sound and that's it. After if you need that effect, save money and don't buy an original. I'm really satisfied from that pedal, I have the exact sound that I wanted, the price is really good.
This is a Vintage phase shifter from the 70s. If you want to change the speed of the phasing you have to lean down and change it yourself. By far the best lush phase sound I have ever heard in a pedal, great for those Vintage tone freaks that want to collect something from the past.