 One of the very interesting experiment that you can deal with the SD25 DVPWM ESET board is using its PWM to drive a PA's or speaker. In this example, I'm using a headphone speaker and what I like to do is to drive it with one of the PWM output here and I want to be able to change the sound on the frequency. So without the board power up I will go to PWM control and we'll go to PWM control expert. Now I'm going to turn both of the output off and in this configuration this control the output of this particular pin. So if I wish to plug power into this board and I as you can see I'm producing the sound at 500 Hertz. I can change the sound to say 600. As you can see the tone changes go higher. So just to give you an example or the ability to change sound using the PWM output of the the SD25 DV device. So here the implication is that you could use NFC to basically create music or sound, duration of sound for different purposes and I let your imagination would take you to your next application involving the SD25 DV PWM device. Thank you.