RAS. Switch On / Off bypass by the end of the race.
I had a time this pedal Wha Wha when I was not paying me as a "real". As I often say, it helps out! You learn to use them and we identify the characteristics we prefer and we will put forward in the purchase of the "real". This pedal was a race too long for my taste, it was also too soft. But there was a price that wha first served its purpose and not sound too bad.