Specifications: 2102 chip, generate COM port after installing driver On-board status indicator, transceiver indicator, the status indicator will be on after the driver is properly installed, and the transceiver indicator will flash when communicating, with the running LED indicator Support baud rate from 300bps to 1Mbps Communication format support: 5, 6, 7, 8 data bits; support 1, 1.5, 2 stop bits; odd, even, mark, space, none check Support operating system: windows 8.1/7/vista/xp/98, Mac OS-X/OS-9, Linux USB dock connector is MICRO MINI-USB Module size: 16*20mm (super small, 1mm = 0.0393inch) Note: The installation of electronic modules requires basic knowledge and requires a certain electronic professional foundation and hands-on ability. Please purchase carefully! Manual measurement, with small error. Please check size in detail before purchase. Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 2Pcs

With DTR trigger signal output, you can directly download program communication to Arduino motherboard such as arduino pro mini ATMEGA328P. The CP2102 core CJMCU-CP2102 is a highly integrated USB-UART bridge that provides an easy solution for RS232 conversion USB with minimal component and PCB space. Connect the standard MICRO MINI-USB line input to the computer USB interface, with 3.3V and 5V voltage two power output. Similar to the working principle of other USB-UART switching circuits, the USB port of the PC is virtualized into a COM port through the driver to achieve the purpose of expansion. The CJMCU-CP2102 is highly integrated with a built-in USB 2.0 full-speed function controller, USB transceiver, crystal oscillator, EEPROM and asynchronous serial data bus (UART) to support modem full-featured signals without any external USB devices.