What is korbit US?

What exactly is Korbit US? Is it a new cryptocurrency exchange platform specifically designed for the US market? Or is it a service extension of the existing Korbit platform aimed at catering to US-based traders and investors? How does it differ from other exchanges in terms of features, security measures, and the cryptocurrencies it supports? Additionally, what are the fees associated with trading on Korbit US, and how does it compare to its competitors in terms of user experience and customer support?