I can say clearly for myself that I was not entirely impressed with the toy due to the size and low vibrations I could get over one of those features if the other was there to take its place. I do like toys that can be utilized in water so that was a nice feature, though over all, this one will probably not get much use from me.

If you are looking for a decent priced, powerful and filling vibrator, then keep searching. Sina is a low quality, loud vibrator. You won't be impressed by its lack of variety and function, and you might just end up putting it right where I did- in the garbage.

It has good vibrations and is very quiet. Being waterproof, it has all the qualities I love in a toy. I would buy another one just like it if this one ever quits. It's easy on batteries. I'm still using the first set of batteries and it's not slowing down at all.