Indicator Light: PWR: Power indicator light, connected to USB, lights up when voltage is detected TXD: Transmit indicator light, lights up when data is sent from the USB port RXD: Receive indicator light, lights up when data is sent back from the device interface Product Type: Industrial USB to TTL Serial Port Cable Chip Solution: FT232RNL Host Interface: USB Communication Rate: 300bps~3Mbps Device Interface: UART USB Interface: Interface Form: USB-A Type Interface Interface Protection: Resettable Fuse, ESD Electrostatic Protection UART Interface: Interface Form: 4PIN Cable Loose Ends SH103PIN Fool-proof Serial Port Interface Interface Protection: IO Protection Diode Circuit Due to different batches, the appearance, color, and printed words of the product may vary, which will not affect the use. Material: Plastic Color: Black Package Contents: 1 x Serial Module Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.