Could you elaborate on the nature and characteristics of Stealthex crypto exchange? I've heard of numerous exchanges but this one piques my interest. I'm particularly curious about its security measures, user interface, supported cryptocurrencies, trading pairs, and perhaps any unique features it offers that set it apart from the competition. Additionally, I'd like to know about its transaction fees, withdrawal limits, and any regulatory compliance it adheres to. A concise yet comprehensive description would be highly appreciated.