The Sonic Foamer uses a finely calibrated, ultrasonic vibration which invisibly passes into the beer. This vibration activates the gases to create consistent sized bubbles for the perfect foam head. Press the button and the beer explodes inside. As if by magic, the head appears on top. The aroma of a beer is released as the bubbles in the head pop. The Sonic Foamer allows you to start with a great head and recharge it at any time. The Sonic Foamer is a must have for the serious Craft Beer lover!