The Zolo Stealth features an optional performance sensor mode that increases intensity naturally as you penetrate. That particular mode takes vibration control out of your hands (so to speak) just a little bit, but you'll be gambling on practically guaranteed pleasure! Zolo Stealth is a totally discreet shape that'll arouse everything but suspicion, 8 vibration patterns and five speeds, Super secretive and easy to slip into suitcase, backpack or briefcase, the Stealth isn't identifiable as masturbator at all - until the cap is off, that is. Pop it to reveal the non-detailed entrance to a long tunnel full of twisty ribbed and dotted texture. Comfortable in hand, yours or your playmate's, the Stealth's vibrating functions are easy to control using simple buttons at the base. Activate vibration by holding the power button down for 3 seconds, then push it in quick bursts to explore 8 deep, throbbing modes of vibration. Increase or decrease intensity with buttons to the side. Remember that performance sensor mode we mentioned? Hold the power button another three seconds to turn it on. Ante up! Rechargeable via USB and complete with padded travel pouch, the Stealth is definitely portable and always ready to play. 2 hours of charge time will provide up to 1.5 hours of playtime. Not rated for use in water. One Year Warranty.