This product is retired, please consider our USB To Uart 5V/3V3 as your alternative choice. USB To Uart 3V3 is a USB to serial adapter, which is based on CH340, a USB bus convert chip. It can realize the convert of USB to serial interface/IrDA infrared/printer interface. This module can be used for uploading code or communicating with MCUs. Features Full speed USB device interface, conforms to USB Specification Version 2.0 Supports baud rate varies from 2400bps to 115200bps. Hardware full duplex serial interface, set transceiver buffer LED Indicator Specification Working Voltage ：DC 5V Working Current