Material characteristics:    
 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.