Features: for DC simple bull socket interface, smooth plug and unplug, sturdy and reliable, prevent reverse connection On-board IO for protection circuit, anti-surge, stable and safe communication On-board resettable fuse and transient suppression diode, anti-overcurrent and overvoltage, anti-backflow, anti-static, improve shock resistance, stable and safe communication The onboardTTL serial port 3.3V and 5V level conversion circuit can switch theTTL communication level There are 3 LED indicators on the board, which is convenient to check the status of power supply and signal sending and receiving Specifications: Host interface: USB Communication rate: 50bps-6Mbps Device interface: UART USB interface: interface form: USB-A type interface; interface protection: self-recovery fuse, ESD electrostatic for protection UART interface: interface form: terminal; interface form: 8PIN foolproof interface; interface protection: IO for protection diode circuit Indicator light: PWR: Power indicator, connected to USB, and lights up when voltage is detected TXD: Send indicator, light up when data is sent from the USB port RXD: Receive indicator, light up when data is sent back from the device interface Compatible system: Support for Win7/8/8.1/10/11, Linux, Android and other systems Size: Approx. 53x23.5x14.6mm/2.08x0.92x0.57 inches Color: Black Material: Industrial Grade Material + metal Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x USB toTTL Conversion Module 1x 8Pin Cable