BT BIG Button + - Manual (Page 25)

BIG Button + ~ 4th Edition ~ 15th April ’02 ~ 4380
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To use the Amplify button
Press the Amplify button to turn amplification on.
Amplify – and + allow you to decrease or increase
the level of amplification.
The setting last used on Amplify will restore each
time you turn amplify on.
To increase the amplification press the + button.
To decrease, press the – button.
To turn Amplify off, just press the AMPLIFY
button again.
The red LED will light up to show when amplify is
switched on.