These are for less than "beginner", for people who are "pre-beginner", maybe in the "experimenting" with nipples stage.
I was disappointed with the (lack of) intensity, and the fact that they fall off too easily. I would only recommend these for experimenting with gentle nipple play, and for mild tugging on nipples during self-play.
An unintimidating option for those interested in experimenting with nipple play. More advanced users may be a little bored with these clamps, since they are on the looser side. However, the intensity of the vibrations helps to make up for the lack of pressure.
Nipplettes are a mild nipple clamp perfect for beginners just being introduced to the wonderful world of nipple play or for those who are extremely sensitive and have been cautious of clamps because of a low pain threshold. They are adjustable, splash-proof, made of plastic with Rubber Cote and velvet to the touch. They deliver intense vibrations and have an easy push-button control and the vibrations make these clamps versatile to clamp onto any other parts of your body that need attention.
California Exotic's Nipplettes are a nice addition to the world of nipple toys. These wireless, adjustable nipple clamps provide a nice buzz coupled with medium weight and easy push-button control. They are not waterproof, as advertised, but rather more like splash-proof.