updated description

modules/controller/microbit/tone-amplifier/index.md

@@ -11,4 +11,6 @@ This module is built like the [relay]({{site.baseurl}}/modules/controller/microb
 The code below plays a "power up" melody when button **A** is pressed and "power down" when button **B** is pressed. The speaker should be connected
 to the MOSFET connected to the pin ``P0``.
 
+> Click on **Download** to transfer the code to your micro:bit
+
 <div style="position:relative;height:0;padding-bottom:70%;overflow:hidden;"><iframe style="position:absolute;top:0;left:0;width:100%;height:100%;" src="https://makecode.microbit.org/#pub:_2MAModLFy0tj" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>