Maximize your pleasure tool with the Optimum Series Automatic Smart Pump, a sleek, durable penis pump sex toy for men, made for superior suction and performance enhancement. Increase endurance, improve stamina and amplify your rod with 3 unique enhancement exercise modes. The sleek smart pump has easy touch controls and a quick air release button for customization pumping. While the thick open end sleeve and tight, nubby chamber give you sinful stroking pleasure with or without the pump. Never settle for less when it comes to the size of your pleasure with the Optimum Series. The cylindrical pump and thick, durable sleeve are designed to create the perfect seal and powerful suction at the touch of a button. Once you have reached your peak pump, use the quick air release to decrease suction or release seal. When used regularly, this powerful pumper can increase stamina, enhance overall size and amplify sensation. Recharge the premium pump in 90 minutes with the provided USB charging cable to enjoy 60 minutes of high-speed stimulation or 80 minutes of low speed suction. To track progress, use the incremental measurement marks on the cylinder shaft. The premium sleeve fits into most standard pumps, but can be used independently for a passionate stroking experience. The premium Thermoplastic Rubber TPR is a body safe, unscented and phthalate free to keep you most sensitive spots, happy and healthy. Enjoy easy clean up with this maintenance free stimulator sleeve, simply wash with soap and warm water before and after each use. Use ample lubricant for easy insertion. Color Black. Materials Polystyrene, ABS Plastic, Thermoplastic Rubber TPR. Power Source USB Rechargeable, Included. Features Phthalate Free, Rechargeable. Allergens N/A. Warranty. 90 days warranty. Measurements 8 inches by 2.5 inches Cylinder, 5.25 inches by 3 inches Sleeve. Weight bulk 24 ounces.