5pcs USB 2.0 to TTL UART 6PIN Module Serial Converter CP2102 STC PRGMR This is a USB 2.0 to TTL UART 6PIN CP2102 Module Serial Converter. Connect MCU easily to your computer! Stable and reliable chipset CP2102 USB specification 2.0 compliant with full-speed 12Mbps Standard USB type A male and TTL 6pin connector. 6pins for 3.3V, RST, TXD, RXD, GND & 5V Supports Windows 98SE, 2000, XP, Vista, Window7, Mac OS 9, Mac OS X & Linux 2.40