Soft ticklers on the inside to stimulate the head/ penis tip. Booster is 100% body safe silicone and completely waterproof. Booster also has an amazing 7 powerful functions. The cup is lined with lots of little ticklers that dance and vibrate around the head of your penis. Use this alone to tease yourself to climax, or use this with a partner for an all new thrill. Insert the head of your erect penis into the silicone cup and roll it around for an orgasmic tickling sensation. • Material: Silicone, ABS Plastic  • Powered By: 3 Cell Batteries (LR44)  • Special Features: Waterproof, Multifunction, Travel Soft ticklers on the inside to stimulate the head/ penis tip. Booster is 100% silicone and completely waterproof. Booster also has an amazing 7 powerful functions.