This product is a data recorder, which can be recorded on the memory card through the UART universal serial port. This function is similar to the black box to record the data from the main device to the serial port and save the data in text form on the memory card. This product can be used for the flight control board with cleanflight firmware, connecting to the corresponding serial port, and by setting up the software cleanflight configurator of the host computer, the important running data of the UAV can be recorded on the memory card. flight data recorder software is used to the flight records. Note: after the first plug in the memory card, the memory card will produce the config. file, which changes the baud rate parameter of the serial port. This parameter can be modified. Please keep the baud rate of the flight control or the main circuit's serial port to be consistent with the baud rate of the recorder. Parameters: Input voltage 3.3V~12V (recommended as 3.3V~5V) The memory format is FAT32, supporting the maximum 64GB memory UART serial interface Baud rate adjustable The default bootloader is pro Mini atmega328P 5V 16mhz tip: Different batches may have different appearance, which does not affect use. Material: PCB colour: random color Note: randomly colored. Cannot be chosen the specific color. Package Contents: 1 x Serial Data Logger with pin 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.