Full speed USB device interface, compatible with USB V2.0, standard usb-a public design;Direct power connection from USB to PC Analog standard serial port, used to upgrade the serial peripheral, or add additional serial ports through USB;It supports 3.3V and 5V TTL , and the serial port application is fully compatible with computers under Windows , without modification; Support 5, 6, 7 or 8 data bits, support odd check, even check, blank and no parity check; Support the transmission rate of serial port sending control signal and modem contact signal and serial port receiving signal;Plus level conversion module, supporting RS232, RS485 and other interfaces; (support module sold separately) Two parallel port interface modes: EPP Mode and mode; USB to parallel port can be used for simple digital I / O control; Support various serial communication modes, UART, I2C, SPI, etc;Support 2-wire and 4-wire synchronous serial interfaces, and I2C supports 4 transmission speeds;Fully support STC MCU download and debugging, STC recommended Support external 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, supporting communication rate of 50bps ~ 2Mbps. Support Windows 98 / / 2000 / XP / Server 2003 / Vista / Server 2008 / Windows 7 / 64 / 32 bits. Application: Analog standard serial port, used to upgrade the serial peripherals or add through USB. Where I2C, SPI, UART and TTL serial ports are required; Electronic debugging and downloading; Debug various hardware and software ; Serial port flashing Serial port expansion: emulates the standard serial port, used to upgrade the serialport peripheral equipment, or add additional serial ports through USB; Hardware debugging: use I2C to debug I2C interface chip, burn I2C interface EEPROM, SPI interface flash memory; MCU burning: burning to MCU through UART interface; debugging: obtain print information through UART interface and check running status; Data acquisition: acquire and save the data of sensor equipment through I2C and SPI; Brush machine: serial port brush machine, firmware update, brush TV, router, motherboard and other equipment. Colour:As Shown Material:PC+metal Package Contents: 1 x adapter 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.