These nipple clamps are really fantastic! First, I love the very soft, high-quality silicone material. The teal color is really nice. While these clamps are not adjustable, the clamp pressure was just right for me and not too tight or uncomfortable.....and they stay on!!! I believe for most folks, they will be happy with the clamp's pressure.The multiple vibrating & pattern modes are AWESOME and very stimulating. You can use the included remote (which comes with a battery) or the app (downloadable) to control the vibration modes.The nipple clamps also come with 2 magnetic, USB charging cords and charge quicly and fully lasted for our play session. I would definitely recommend these great nipple clamps for your adult toy collection.