Features: Adopt FT232RNL chip program, fast speed communication is stable, good compatibility Half-hole process, compact size, easy for users to weld and integrate into the embedded use Support 300bps~3Mbps serial communication rate. On-board self-recovery fuse and ESD protection tube, overcurrent and overvoltage prevention, stable and safe to operate. On-board serial port send/receive, you can check the signal send/receive status. Reserve VCC switching pad, the default is 3.3V TTL, can be cut and rewelded to 5V pin out all the functions of the chip, convenient for secondary development and integration of the use of USB TypeC interface Specifications: Item: USB to UART/TTL Series Module Chip:FT232RNL Chip Version: Optional As Pictures Package Includes: 1PC USB to UART/TTL Series Module note: Due to problemsof lighting effect and shootings, there will be tolerances in the product, please understand. Please allow 0-1cm error due to manual measurment.