EUROLITE B-20 is a portable mini bubble machine designed for parties, weddings, birthday celebrations and similar indoor events. It generates many hundreds of bubbles per minute and provides two selectable speed levels. The unit operates from four AA batteries or a USB power bank and includes a USB power supply. Its safety function stops the bubble wheel when an obstacle is detected and delays restart for two seconds after removal. Dimensions are 18 × 10 × 19 cm and weight is 0.62 kg.