This petite pleaser packs a real punch! The waterproof Power Buddies is made of Silicone. The removable 2.5" x .75" bullet can be placed in the sleeve and with the push of the button, intense thrilling vibrations will course through the entire vibe. Requires four watch size batteries (AG-13) , eight are included for your convenience. The sleeve is covered in tiny soft ticklers for that ultimate thrill. A new buddy for the bath! Takes AG13 or LR44 batteries.