This bullet is a perfectly discreet companion that easily fits in your purse and delivers powerful vibrations in 7 wonderful patterns. Waterproof vibrations. Bullet vibrator uses 2 AAA batteries, not included. Vibrator measures 15.5cm by 1.8cm and insertion length 13cm e or approximately 6.10 inches by .70 inch with an insertion length of about 5.11 inches. From Maia.