The PXVF3500-KIT is a device featuring a 4-microphone linear array that handles front-end signal processing to enhance voice quality. It can output two streams of processed audio simultaneously, one for automatic speech recognition (ASR) and the other for communication and conferencing (Comms). It supports audio transmission via the USB Audio Class 1 (UAC1.0) protocol, making it compatible with all major operating systems such as Windows, MAC, Linux, and Android. Plus, it can function as a USB sound card when connected to an operating system.