ITEM NAME:RobotDyn Usb To TTL UART CH340 - Serial Converter, Micro-Usb, 5V/3.3V, IC C K5Z4 RobotDyn Usb To TTL UART CH340 - Serial Converter, Micro-Usb, 5V/3.3V, IC C K5Z4 USB to TTL CH340, 5V/3.3V - Serial Converter, with Micro-USB socket. Logic level tolerance for 3.3V and 5V, not need switching. Base on USB converter IC CH340G, with frequency 12MHz. Driver: Pls install driver for CH340/CH340G Colour: Black Material: plastic + metal Package Contents: 1*USB to TTL UART CH340 Serial Converter.USB to TTL CH340, 5V/3.3V - Serial Converter, with Micro-USB socket. Base on USB converter IC CH340G, with frequency 12MHz. Logic level tolerance for 3.3V and 5V, not need switching.