Multiple Power Supply Options: The bubble blower can be charged in three ways: plug in with an adapter (not included), use a power bank, or insert 4 AA batteries (not included), offering maximum convenience for both indoor and outdoor use.Note : that if the cover falls off after a few uses, you can install it manually because we have thought of this when designing the product. Please install the cover manuall.We are equipped with a screwdriver so you can install the battery manually yourself.Upgrade Bubble Blower with 2 Fans:Our LED enhanced bubble machine can generate over 20000+ colorful bubbles per minute with 26 spinning wands, 2 fans & super built-in motor. which blow thousands of bubbles in minutes.High Quality Materials & Safe Design:Our outdoor bubble machine is made of study ABS material.It has been tested for child safety and complies with all US toy safety standards (CPSIA, CPC, ASTM).Safe for toddlers; pets; and adults. Upgraded super motor for fast bubble dispensing, high quality and durability.Perfect Gift For Kids & Parties:This Bubble Machine Can Bring Endless Fun And Dreamy Atmosphere In A Series Of Activities Such As Weddings, Birthdays, Parties, Outdoor Garden Yard Etc.