What do the buttons on Crescendo 2 Bendable Vibrator do?

You can control Crescendo without connecting to the app using the buttons. Use the arrow buttons to cycle through the vibes, and use the + and - buttons to change the intensity. To turn Crescendo ON / OFF press and hold the right arrow button for 2 seconds. To connect to the app, open the app and when it prompts you to connect with Crescendo, press and hold the left arrow button for 2 seconds.