1. Adopts CH340 to serial port chip, stable performance and good compatibility. 2. The adapter board integrates 1000uF solid capacitor to current supply. 3. The WIFI module not freeze and become unresponsive due to power problems,which improves the working stability of the serial port and is beautiful and stylish. 4. Adopts 3225 chip crystal oscillator. 5. This adapter is simple in design and can easily connect ESP8266 to PC through the serial port. Module Function:Converter Sensor Function:Current Note:This module is only a USB to serial module, which is only responsible for converting the USB interface into a serial port suitable for the ESP8266 module.For all the convenient knowledge of WIFI, please refer to the relevant information of ESP8266 module! Due to different batches, the product appearance and printed text , but it not affect the use. Colour:Black Material:Plastic Package Contents: 1 * Module rotation board 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.