20pcs 3.3V 5V USB to TTL Converter CH340G UART Serial Adapter Module STC

Description 1 Support WINDOWS 98 ME 2000 XP Server 2003 VISTA Server 2008 Win7 Win8 32 Bit 642 Support USB1 1 or USB2 0 USB3 0 for communication 3 Simulation interface you can upgrade serial peripherals 4 Supports common MODE contact signal 5 Supports IRDA SIR infrared communication 6 Information download here 7 Provide RS232 RS485 RS422 interface 8 Programming does not affect the target board program runs Package includes 20 x Adapter