Advantage: -Most Bubbles -No leakage -Durable, lightweight, portable, no taking up -No sharp edges -Comply with European and American product safety standards: ASTM, CPSIA, CCPSA, EN71 Easy to operate: 1. Install 4*AA batteries (not included) according to the electrode instructions, and tighten the screws of the battery cover 2. Remove the empty bottle, pour in the prepared bubble solution (not included), then install the bottle back to the corresponding position and tighten the bottle. 3. Lay the bubble machine flat and turn on the switch Why choose Aupmeka bubble machine -Children always love playing with Bubbles. Even if the Aupmeka bubble machine is overturned, it will not leak a drop of bubble refills. You don't have to worry about your child getting dirty by overturning the bubble solution. -Suitable for various occasions: birthday party, family get-together, wedding, pet games, stages, holiday parties, housewarming, pool party, Independence Day, Halloween, Christmas, Thanksgiving Day, baby shower, etc... -Bubbles are a medium for conveying emotions. Everyone is surrounded by bubbles, that will be an unforgettable memory.