1. On-board resettable fuse and transient suppression diode, anti-overcurrent and overvoltage, anti-backflow, anti-static, improve shock resistance, stable and safe communication2. On-board IO protection circuit, anti-surge, stable and safe communication3. The onboard TTL serial port 3.3V and 5V level conversion circuit can switch the TTL communication level4. There are 3 LED indicators on the board, which is convenient to check the status of power supply and signal sending and receiving5. DC simple bull socket interface, plug and unplug, sturdy and reliable, prevent reverse connectionSpecification:Product name: USB to TTL conversion moduleProduct Type: Industrial Grade USB to TTL ConverterHost interface: USBCommunication rate: 50bps~6MbpsDevice interface: UARTUSB interface: interface form: USB-A type interface; interface protection: self-recovery fuse, ESD electrostatic protectionUART interface: interface form: terminal; interface form: 8PIN foolproof interface; interface protection: IO protection diode circuitIndicator light:PWR: Power indicator, connected to USB, and lights up when voltage is detectedTXD: Send indicator, when data is sent from the USB portRXD: Receive indicator, when data is sent back from the device interfaceCompatible system: Support Win7/8/8.1/10/11, , Linux, Android and other Product size: 53 x 23.5 x 14.6mmColour: blackMaterial: plasticPackage Contents:1 x USB to TTL conversion module1 x 8pin cableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.