1.6ft industrial grade USB to RS232(DB25 Male) adapter cable. It is an ideal solution Compatible computer to communicate with many serial devices directly through USB port such as CNC, PLC, plotter, modem, Scanner etc 2.This cable is designed to make connection between USB port and serial devices(RS232), NOT Compatible parallel printer or other devices based on parallel protocol (IEEE-1284), even though both have DB25 connector. It is a USB to Serial cable with Software Handshaking using only three signals: TXD(Pin2), RXD(pin3) and GND(pin7). Check your devices setup prior to purchase. 3.Works with USB 1.1 & 20 Host and Hub ports Powered directly by USB port no external power adapter required 4.Industry Standard F/;TD/;1 chip set & device drivers to ensure maximum compatibility and superior reliability Compatible industrial application Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.