Usage Tips:4 computers share 1 RS232 serial port device or 1 computer shares 4 RS232 serial port devices Physical isolation, effectively preventing RS232 data serial connection, safe and stable Button switching, no need to install driver, convenient and fast Suitable for RS232 data switching, automated workshops, industrial applications and other scenarios The serial port switcher has the function of RS232 serial port data switching, which can allow multiple computers to share one RS232 serial port device, or one computer to share multiple RS232 serial port devices. The product does not require driver installation, just plug and play. Convenient and fast, share RS232 devices and easily realize data sharing. Colour:Black Material:Metal Size:118x94x38MM Package Contents: 1 * RS232 Switch 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.