Product selling point:1. Using high-quality materials, the quality is guaranteed2. Immersion gold plate process3. Small and beautiful appearance4. Simple and convenient to use5. Widely used such as radio modification, mobile phone flashing, XBOX360 flashing, GPS, car inspection, DVD flashing, hard disk maintenance, set-top box upgradeParameter:TTL (UART) side:VCC: Connect DC 3V to 5.5VGND: Connect to GNDTXD: Connect the TTL end of the external device RXDRXD: connect external device TTL end TXDRS232 port:RXD: Connect external equipment RS232 TXD terminalTXD: Connect the RS232 terminal of the external device RXDGND: Connect to GNDNote:TTL and RS232 terminals need to cross-pair TXD with RXD and RXD with TXDPackage Included:1* Serial port module