The Synergy Pleasure System is the best vibration-based pleasure device this reviewer has ever reviewed. It comes with a variety of nifty attachments, each providing its own unique sensations, and the vibration itself feels deep and satisfying, as opposed to the stinging sensation so many other products deliver. Just plug into the wall to charge the rechargeable batteries, and select the attachment of your choice. Bliss. Additionally, it comes with an informative and easy to understand guide, complete with tips, suggestions, useful sexual knowledge and product information. Recommend with confidence.