That's right... 8 levels of powerful stimulation delivered by the Double Action Arousers! The silver bullets (2 1/4" X 1/2") have an exquisitely textured, soft, supple, removable Silicone purple sleeves. The easy touch control pads with LED displays have a contoured case for ergonomic versatility. Uses 4 AA size batteries, not included. The power behind the Double Action Arousers is indescribable... it will take your breath away! Twice!