6 Pin USB 2.0 to TTL UART Module Serial Converter CH340G Module STC 5V/3.3V Description: Support WINDOWS 98 / ME / 2000 / XP / Server 2003 / VISTA /Win7 / Win8 32 Bit / 64. Support USB1.1 or USB2.0/USB3.0 for communication. Simulation interface, you can upgrade serial peripherals. Reserve 3.3V & 5V pin interface,easy for the DDWRT of different voltage system that need power. The entire board is coated by high quality transparent heat-shrinkable sleeve. Two data transmission indicator can monitor data transfer status in real time. Supports common MODE contact signal. Supports IRDA SIR infrared communication. Provide RS232, RS485, RS422 interface. Package Included: 1 x CH340G Module