The Eva II from Dame is the first hands free vibrator we have seen like this! There are flexible wings that tuck under the outer labia to keep itself in place over the clitoris. Eva II is meant to stay in place during penetrative sex. There are 3 vibration intensity settings that are controlled with one button on the top of the toy. Water-proof. Made of 100% silicone. Chargeable via the included case with USB cable and wall adapter. The charge lasts for 5 hours on the low setting and 1 hour on the highest setting. Eva has a one year warranty.