Qunqi CP2102 Module STC Download Cable USB 2.0 to TTL 5PIN Serial Converter 100% Brand New CP2102 Module Stable and reliable chipset CP2102 Connect MCU easily to your computer! Standard USB type A male and TTL 5pin connector. 5pins for 3.3V, RST, TXD, RXD, GND & 5V Supports Windows 98SE, 2000, XP, Vista, Window7, Mac OS 9, Mac OS X & Linux 2.40