CP2102 USB 2.0 to TTL UART Serial Converter Module 5P STC PRGMR with Cable
Standard USB type A male and TTL 5pin connector. 5pins for 3.3V,TXD,RXD,GND & 5V. Adapter Module. Step down module. Display module. Step up module. Wireless module. All handshaking and modem interface signals.