Usage Scenarios - Suitable for connecting PC computers with industrial-grade RS232 serial and parallel port devices. Port Type:4 Port RS232Serial+1 Parallel Port Interface Type:M.2 (M+B Key) Data Bits:5, 6, 7, 8 Stop Bits:1, 2 Product Name:M.2 (M+B Key) to4RS-232DB-9Serial Ports and 1 DB-25 Parallel Printer Ports (LPT1) Controller Card Model:10-M2F384-4S1P Parity Bit:Even, Odd, Mark, Space, None Operating Temperature:-40℃ to +85℃ Storage Temperature:-55℃to +125℃ Weight:N/W:365g System Compatibility:Supports , Linux and other systems Colour:Black Material:ABS Size:Main Board:22x80mm, Daughter Board:45x67mm Package Contents: 1 * Printer Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.