Full-speed USB device interface, compatible with USBV2.0.Built-in firmware emulates standard serial ports for upgrading serial peripherals or adding additional serial ports via USB.The serial port applications under the Windows operating system on the computer side are fully compatible and do not need to be modified.Supports the built-in CDC class driver of the operating system without installation or the multi-function high-speed VCP manufacturer's driver.Hardware full-duplex serial port, built-in transceiver buffer, support communication baud rate 50bps ~ 6Mbps.The serial port supports 5, 6, 7 or 8 data bits, and supports odd parity, even parity, blank, flag and no parity.Support common MODEM contact signals , DTR, DCD, RI, DSR, .Support and hardware automatic flow control. Support half-duplex, provide sending status TNOW Support RS485 switching.Support RS232 interface by adding level conversion device.The USB terminal supports 5V supply voltage and 3.3V supply voltage.The serial port I/0 is independently powered, and supports 5V, 3.3V, 2.5V, and 1.8V supply voltage.Built-in -on reset, built-in clock, no external crystal oscillator required.The chip has a built-in Unique ID (USB Serial Number).Available in SOP16, ESSOP10 and QFN16 lead-free packages, RoHS compliant.type: moduleFeature 1: USB to TTL converterFeature 2: CH343G USB to serial port moduleFeature 3: CH343G modulecolor:BlueMaterial:PCBsize:40 x 19MMPackage Contents:1 x ModuleOnly 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.