ITEM NAME:USB 2.0 to TTL UART 6PIN Module Serial Converter CP2102 STC Module Tide.This is a USB 2.0 to TTL UART 6PIN CP2102 Module Serial Converter. Connect MCU easily to your computer. Standard USB type A male and TTL 6pin connector. 6pins for 3.3V, RST, TXD, RXD, GND & 5V. Byte receive buffer; 640 byte transmit buffer.