4 Port USB to Serial Adapter RS-233 1.Dual data buffers 2.Auto handshake 3.Remote wakeup & power management SpecificationThis 4 Port USB to RS232 Serial Hub lets you connect up to four RS232 serial devices to your Mac or PC laptop or desktop computer through a single USB port, as though the computer offers built-on DB9M serial connectors. The RS232 Serial Hub is compactly designed to preserve ...