Update README.md

nixonsam · Feb 13, 2020 · 9f008d7 · 9f008d7
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@@ -432,6 +432,7 @@ $('#sendFeedback').click(function(){
 ### Real-time volume indicator on UI
 Display user real-time volume of mic and speaker.
 'volume' event handler will be invoked 60 times per second. The handler receives inputVolume and outputVolume as percentages of maximum volume represented by a floating point number between 0.0 and 1.0, inclusive. This value represents a range of relative decibel values between -100dB and -30dB.
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 ![plivo-websdk-2.0-example](img/volume.png)
 
 ```js