Full-speed USB device interface, compatible with USB V2.0, Standard USB-A male design;Direct power supply from USB connectin to PC.Analogue standard serial port, for upgrading original serial peripherals, or increased additional serial port via USB;Support 3.3V and 5V TTL target system, the serial application is fully compatible with the computer under the Windows operating system, without need for modification;Support 5, 6, 7 or 8 data bits, to support odd parity, even parity, blank signs and no parity;Support the serial port to send control signal and MODEM liaison signal of transmission rate and serial receiver ready signal ;Plus level conversion module, support RS232, RS485 and other interfaces; (supporting modules are sold separately) Two parallel port interface way: EPP mode and MEM way; USB to parallel port can be used for simple digital I / O control; Support a variety of serial communication mode, for UART, I2C, SPI, etc.; Support 2-wire and 4-wire synchronous serial interface, for I2C support 4 kinds of transmission speed; Perfectly support STC MCU program download and debug, STC official recommended program; Support the outwards output voltage, optional 3.3V/ 5V or no output; Support working status indication; Dual interface output; Hardware full-duplex serial port, built-in transceiver buffer area, support the communication baud rate 50bps ~ 2Mbps. for WINDOWS 98/ME/2000/XP/server 2003/VISTA/server 2008/WIN 7/64/32-bit.Color: As ShownMaterial: PCPackage Contents:1* Adapter Module(Interface and pin header colors are random.)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.