Now there is a strong vibrating bullet with 10 different vibration functions! Never go looking for those tiny watch batteries again, this bullet comes with a rechargeable battery pack that doubles as the speed and rhythm controller. Intensely powerful and quiet, this vibe will have you coming back for more! This bullet is so versatile, you'll never run out of ways to use it and you'll have the time of your life discovering all it's capabilities. When it's time to recharge the battery, slide the cap off the end of the controller to expose the USB connection, plug it into a USB power source and in about 2 hours your bullet will be ready to play again!