These came sealed in a plastic bag in an Eden box. The box is a little big, but I am keeping the nipple clamps in the same box as the controller. I thought the clamps looked easy to use and very straight forward in their design.

I used these by myself in conjunction with the controller (see that review here)controller
I followed the instructions and put a little water-based lube on my nipples to make a better connection. I don't have large nipples, and I did have a little trouble getting the clamps to stay on at first. I hit the power button and cranked up to dial to about 75% and hit the tap option. Wow! Way too much for me. It was too much power. I quickly cranked the power down to about 25%, and that became a pleasurable combination of pleasure and pain. I have always enjoyed nipple stimulation. There seems to be a nice link from my nipples to my other erogenous zones. I could feel the electricity go into my nipples and then feel a tingle in my groin area. Maybe it was just mental, but I could feel it.

The next time I used the nipple clamps, I did use any lubricant. They stayed on much better, and I did not experience any connectivity problems. This time I went through the other stimulation options a little more thoroughly and have decided that the massage option is my favorite.

This toy doesn't really vibrate in the traditional manner. Nothing on it moves. But it does feel like it vibrates for sure. The "3" level of vibration is applicable for both clamps, but there is only one number to use.

My nipples may be sensitive but they are not that sensitive enough to have an orgasm from stimulation of them alone. That is not a knock on the clamps. I never thought I would have an orgasm from them alone and I always planned to use them with another toy to bring myself to orgasm.