The Sinfonia is a two toned silicone g-spot vibrator that is a good choice for both beginners and experts. It requires 2 AAA batteries. The amazing thing about this toy is that it comes with its own storage pouch and accessories. The Sinfonia is waterproof so it can be used in the shower, tub, or even pool. There are 8 differant vibration patterns and only two buttons; one to turn it on and off, and the other to cycle through the differant vibrations.