Uses chip CP2102; Produces an analog serial port after an installed drive; Powered by USB: 3.3V (<40mA), 5V, GND, TX, RX, line level: 3.3V positive logic; With LED indicator: higher transmission speed, brighter light; Supports 300bps ~ 1Mbps transmission speed; Communication format: 5,6,7,8 data, 1,1,5,2 feet, odd, even, mark, space, no test; System: windows vista / xp / server 2003/200, Mac OS-X / OS-9, Linux; USB male port can be directly connected to the computer; High quality SMT SMD.