"● Built-in independent control module, stereo sound source real-time acquisition ● Each module can run at the same time and they do not interfere with each other ● 2 or 4 optional audio channel models。 ● The name of each channel input is defined by the management software ● 10 / 100M adaptive, support DHCP / IP settings, support for LAN and WAN ● 1U design, small-sized and lighter-weighted; anodized aluminum alloy panel, beautiful and durable. "