How do I turn it on and off?
Using a remote control. It can go on your wrist, shoulder, or paddle if you're on a SUP. The mobile app allows you to change the power (speed) and duration settings before going in the water.
Button 1: short boost - by default 8 sec.
Button 2: long (or continuous for cruising on a SUP) boost - by default 20 sec.
Buttons 3 and 4 are the same but you can always change that in the app if necessary.
To stop the Boost Surfing Fin just quickly press the button one more time.