This is especially important for the first user, who needs to learn how to feel the different modes. However, it's not strictly necessary: you can still enjoy our remote control women sex toys without vibration and we recommend that you try this out before turning on vibration if possible.For manual control over vibration timing and intensity, press down on the button for two seconds with a finger of your choice (the one that doesn't have an issue touching toys should work just fine). For automatic control over both timing and intensity, hold down this button until it turns green; when it does so, release it.You may find yourself using manual mode more often than automatic mode because once you've found what works well for someone like yourself then there's no need to change things up all willy-nilly!