My girlfriend and I bought two for the small size so we can use them on each other. Both have technology issues. Surprisingly, there is no on/off button. The directions are vague. Through trial and error, I discovered that it stays on one mode by pressing on the tip, not the side. The side will keep changing modes or turn on/off as it pleases. It's like it has a mind of its own, so it's difficult to concentrate on our orgasms due to the constant mode changes as our bodies move around. The finger ring is sized for thin fingers, so I'd like to see the company invest in more size-inclusive options. Also, don't wash it with your kids around because it will turn on even when you're holding it by the ring! I know we cannot return them, so for me it's a substantial disappointment in this product. For reference, she has 1 toy and I have 2, so we bought them to add to our collections.