WINGONEER CP2104 Serial Converter USB 2.0 To TTL UART 6PIN Module compatible with and better than CP2102 This CP2104 Module Serial Converter is designed to be used for USB to TTL electronic projects and STC downloading and Used for upgrade of DVD/hard disk/Router/GPS Standard USB type A male and TTL 6pin connector. pins for DTR, 3.3V, 5V, TXD, RXD, GND This CP2104 Module compatible with and better than CP2102