The California Creations Beer Foamer uses a finely calibrated ultrasonic vibration that invisibly passes through the water and into the beer. This vibration activates the gases to create consistent-sized bubbles for the perfect foam head. Use cold beer for the perfect pint every time. The foam head creates an aroma to take your craft beer experience to the next level. Makes a great gift for Father's day, a birthday, or any beer lover. Requires 6 AA batteries (not included). Comes packaged inside a color shelf box.,California Creations Ultrasonic Beer Foamer