1、Special Safety Design: The fan resistance design, once accidentally touched the spinning rod, the bubble machine will immediately stop working to prevent damage. 2、2 Speed Adjustment: There are 2 speed settings, the bubble volume and the bubble blowing distance are different, which can be adjusted as needed. 3、Durable Material: The bubble machine is made of ABS plastic, has good toughness and rust resistance, lightweight and easy to operate. 4、Convenient Power Supply: Comes with USB charging cable and built in lithium battery, you can use it at any time, no need to worry about power supply trouble. 5、Applicable Scenarios: This automatic bubble machine can blow thousands of bubbles per minute, which is very suitable for parties, weddings or stages to create a party ambience. 1 x Bubble Machine1 x User Manual1 x USB Cable  Item Type: Bubble MachineMaterial: ABSVoltage: 5V/2APower Supply Mode: USB or built in battery power supplyUSB Cable Length: Approx. 1.5meter / 4.9ftProduct Size: Approx. 21.5 x 13.5 x 12cm / 8.5 x 5.3 x 4.7in (without grip size)Capacity: 230mlBattery: 18650 lithium battery 2000mah (included)Rotating Rod: 8First Speed: Bubble Volume Per Minute: ~3500, Available Time: 40 Minutes, Bubble Floating Height: 60°, Bubble Blowing Distance: Indoor approx. 1.5meter / 4.9ft (outdoor is determined by wind speed)Second Speed: Bubble Volume Per Minute: ~6000, Available Time: 30 Minutes, Bubble Floating Height: 60°, Bubble Blowing Distance: Indoor approx. 3meter / 9.8ft (outdoor is determined by wind speed)