Experience 5 levels of intensity with this silver bullet. There are 2 vibration settings, 2 pulsation settings and one pulsate/vibrate setting. The slim bullet is 2 1/4in long with a diameter of 5/8in. It is powered by the new Impulse 5 Pocket Pak which requires 1 watch battery, 2 included and 2 AA size batteries, not included.