1. O Yeah by Screaming O
There are very few models that can top the O Yeah. First off, it uses a gel-filled band ring for a comfortable and stretchable support keeping hard-ons hard for longer periods of time. It uses replaceable AG10 batteries, which provide up to 80 minutes of use. The stimulator stays in place where the raised dots are placed firmly on top of the clitoris. It also has a removable bullet, and also provides different thumb positions. It is waterproof, works well with water-based lubricants, and is made with food-grade silicone. Definitely needs imagination in order to exhaust all possible uses. If you need anything more serious or more intense, you would be hard-pressed to find anything more than this.