The Pi Vibrator features an arch of beads. If you love Tantus` Ripple Small you`ll adore Pi. Not only does it have the small sensible appeal but it`s curved for the body and it vibrates. All the elements feature a new ergonomic base with a grooved base that holds the thumb and is angled for a uniquely comfortable experience. The Pi is a perfect toy for solo or couples play. It also features a removable vibrator that can be easily replaced or upgraded to a multi-speed unit.