ITEM NAME:CH340 USB to ESP8266 WiFi Module Adapter PC Communication Microcontroller Product Description Description: Feature: 1. Using CH340 serial chip, stable performance, good compatibility, Windows system substantially all of the support. 2. The adapter plate integrated 1000uF solid capacitors to ensure the current supply, the power supply will not be a problem to make WIFI module crashes unresponsive. 3. Using 3225 SMD crystal, to enhance the stability of serial work, and the tall and beautiful. 4. The main purpose is to facilitate this transition board ESP8266 connected PC via the serial port. Specification: Product size: 50*17*10mm/1.96*0.66*0.39'' Packaging size: 95*60*10mm/3.74*2.36*0.39'' Packing weight: 7g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand. Included: 1 X CH340 USB to ESP8266 WiFi Module Adapter.Included: 1 X CH340 USB to ESP8266 WiFi Module Adapter. Using CH340 serial chip, stable performance, good compatibility, Windows system substantially all of the support. Using 3225 SMD crystal, to enhance the stability of serial work, and the tall and beautiful.