Features 1、Accurately calibrated ultrasonic vibration, it will enter beer invisibly, thereby activating gas and creating bubbles. 2、The beer bubbler is widely used in bars, restaurants, family gatherings, festivals and carnivals. 3、With this portable electric foam beer machine, you can enjoy delicious beer anytime, anywhere. 4、Easy to use and carry, the foam is soft and rich, and will not affect the taste of beer and red wine. 5、Support USB charging, built‑in 1800mAh polymer lithium battery, suitable for glasses. Specifications Item Type: Beer Foam Maker Material: ABS Current: 2A Vibration Frequency: 110KHz Battery: Polymer Lithium Battery 1800mAh (Included) Charging Time: 4 Hours Working Times: 300 Times Applicable Cup Recommendations:Glass cup and cup bottom thickness ≤ 15mm / 0.6in Weight: Approx. 193g / 6.8oz Vibration Area Diameter: 8.7cm / 3.4in Product Size: Approx. 12.4x12.3x3cm / 4.9x4.8x1.2in How to Use: 1. Turn the product over and turn on the toggle switch at the bottom of the product 2. Add clean water to the water marking line in the tray, and place the beer glass in the middle of the tray 3. Fill the freezing beer to 50% of the glass 4. Long press the ultrasonic touch button to make the beer foam. When the foam has reached a certain level, release the touch button and the blue light flashes when the product is working Package List 1 x Beer Foamer 1 x Manual 1 x USB Cable