The 5"/13cm Power Bullet Breeze Flow, complete with our soft touch feel and beautifully printed design, is our newest product here at BMS. Operating on two "AAA" batteries, our testing showed will last 6 hours nonstop vibrating on high speed, and 12 hours on low speed; amazing power and durability for such a slim classy product. It's so well designed, that when it's operating on high speed, all you hear is quiet vibration and power. To compliment this beautiful product even more, it's priced right! Waterproof.