Thank you for viewing. We strive to ship promptly. The product is new and unopened. The product includes everything shown in the images. New, unused item. Please purchase only if you understand and accept these conditions. Brand: Silver Stone Hardware Interface: USB Operating System: Linux Manufacturer: SilverStone ■ 2 RS232 ports ■ Uses the motherboard's USB 2.0 (9-pin) port ■ Supports 5V power via jumper switch ■ Supports RS232 hardware/software flow control ■ Equipped with a 1024-byte bidirectional data FIFO buffer for faster data throughput I am not familiar with the product, so I may not be able to answer your questions. Thank you for your understanding.