Double Fun Heavy Duty High Output Automatic Bubble Blower Machine Maker Light weight metal case and durable construction, used outdoor/indoor for kids parties, weddings, discos and much more. Large, easy removable fluid tank and adjustable handle. Compact design and quiet motor, easy fill reservoir and easy on/Off switch. Rotations per minute: 18-22 rpm, easy to create thousands of bubbles at the touch of a button. Low Maintenance, it will save your money to maintenance if you cleaning your bubble machine regularly.