Ultrasonic beer foamer $ 11.87 Beer bubbler Working principle: Ultrasonic Vibration frequency: 110khz Working voltage: 3.7V Maximum working current: 2A Charging current: 500mA Battery Specification: 1800mAh / 3.7V with protection plate Product material: ABS + PC Product size: 123 * 32mm Package size: 151 * 50 * 155mm
