Thank you for your inquiry!
The speed adjustment is located on your keypad. Press and hold the +/– key to increase or decrease the speed of the bubbles.
Holding the button will cause the speed to cycle from the highest to the lowest setting and back up.
Remove your finger from the button when you reach the desired speed.
The speed will reset to the maximum each time you turn on the blower.
For additional support, please email sales@jettacorp.com.