Features: 1.Support: Support USB expansion 4 way TTL UART with hardware flow control, can communicate at the same time, independent of each other. The onboard TTL serial port 3.3V and 5V level conversion circuit can switch the TTL communication level. 2.Multiple Protection Circuits: On board resettable fuses and protection diodes can ensure stable output of current and voltage, prevent overcurrent and overvoltage, and improve shock resistance. 3.Stable and Safe: On board IO protection circuit, anti surge, anti static, stable and safe communication. 4.Aluminum Alloy Shell: Oxidized and frosted treatment, CNC numerical control opening, firm and durable, exquisite workmanship. 5.Interface: High quality USB B and DC simple bull socket interface, smoothly plugging, firm and reliable, prevent reverse connection. specification:Item Type: USB to UART Adapter Material: Aluminum Alloy Device Interface: UART Host Interface: USB Communication Range: 1200bps-460800bps USB: 1. Interface Form: USB B Type Interface 2. Interface Protection: Self Recovery Fuse, ESD Electrostatic Protection UART: 1. Interface Form: 6PIN Anti Reverse Connection Interface 2. Interface Protection: IO Protection Diode Circuit PackageList: 4 x6PINDupont Line To Loose Head 1 x Usb Cable 1 x Adapter