for programming microcontrollers such for , boarduino, Bareduino, , ESP8266, Mini minimOSD, and Xmega Xplained, mini pro, or any other that can be programmed over serial After installing the driver,This TTL adapter a COM port on your computer/laptop. Through this simulated COM port, you can communicate or program with various hardware or MCUs, such for board, , ESP8266, router and so on. Main chip: FT232BL Pin Definition: ,,RXD,TXD,GND,VCC Output VCC: 3.3V or 5V USB interface: 2.0 With 500MA self-recovery fuse reversed does protection The maximum speed: 921600bps List of supported systems xp,7,8,10 11.10, 3.0.0-19 10.3 to 10.8 (32 &64 bit) 10.9 and above(64 bit) Instructions for use:(Example MCU) GND: Connect to GND RXD: Connect to MCU.TX (Signal Flow: MCU.TX FT232 PC.RX) TXD: Connect to MCU.RX (Signal Flow: MCU.RX Less than Less than FT232 Less than Less than PC.TX) 3V3/5V: Output 3.3V or 5V (module powered by USB, jumper cap :to 3.3V or 5V) : Connect to MCU. (Signal Flow Direction: MCU. Less than Less than FT232 Less than Less than PC.) : Connect to MCU. (Signal Flow: MCU. FT232 PC.) Material:plastic colour:Black+gold Package Contents: 4 x Adapter Module 4 x 5Pin Line(Note: Random color, don't accept the specified color.) 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.