FAB 100% brand new and high quality<br />No need external power!<br />Supports Industrial PC!<br />Four layer PCB design!<br />Provides four RS-232 male DB9 ports for direct connection to serial devices.<br />Support USB 2.0 HI-Speed.<br />Supports various serial devices modems・ PDAs・ cellular phones・ digital cameras・ card readers・ and more.<br />Easy Plug and Play Installation.<br />Compliance with 16C950・ and is backward compatible<br />Transceiver 128-Byte FIFO<br />Data transfer rate of up to 921.6KB / s<br />Serial port number adjustable<br />LED Status:<br />On Power On<br />Off Power Off<br />system support:<br />windows 10/8.X/7/Vista/xp 32/64-bit・ Linux kernel 2.6.x/3.x/4.x/mac os X10.5 to 10.10 system<br />Size:(L*W*H)10.20*9.50*2.60cm/4.02"*3.74"*1.02"<br />cable length:150cm/59.06"<br />Quantity:1Set<br />  Document<br />         Note:<br /><br />Size for manual measurement・ there may be a 0 to 2 cm error・ belongs to the normal phenomenon.<br />And due to the difference between different monitors・ the picture may not reflect the actual color of the item. Thank you!<br />Package includes(no retail package):<br />1Pc x USB 2.0 4-Port Serial Adapter<br />1Pc x User-Manual<br />1Pc x Type A to Type B USB cable<br />1Pc x Driver CD<br />4Pc xscrews