Amplifier is a temporary event that helps you get required for tasks items x2, or even x4, x6, x8 times faster!
When you see this icon 
on the merge energy progress-bar, the event is active. While it's active, Generators produce items of higher levels only.
When the Amplifier is active, you also spend x2 energy points. It's worth it, though: the higher the multiplier, the higher is generated item's level, so you can complete tasks faster. 😉
If you want to get items of a lower level, or you just want to turn the amplifier off, simply tap on the icon 
and the amplifier will be disabled. 😊
