Ximimark 4Pcs USB 20 to TTL UART 5PIN Module Serial converter cP2102 STc PRgMR Free cableDescriptionStable and reliable chipset cP2102USB specification 20 compliant with full-speed 12MbpsStandard USB type A male and TTL 5pin connector 5pins for 33V,TXD,RXD,gND & 5VAll handshaking and modem interface signalsBaud rates: 300 bps to 15 MbpsByte receive..