The soft silicone sleeve forms an air-tight seal against the skin, creating incredible suction and amazing results, while the clear vacuum cylinder allows you to see your cock get bigger and fatter by the second! The tube is made from thick, heavy grade acrylic and marked with metric graduations to measure your growth. To prolong ejaculation, slide the included enhancement ring over your shaft until it’s nice and snug. The tight squeeze will prolong ejaculation, help maintain your erection. and extend the fun. Powerful Motor Creates Incredible Suction. Quick-Release Valve Instantly Relieves Pressure. Instantly Add Length & Girth. Improve Your Stamina Performance Achieve Stronger, More Explosive Ejaculations. Gain Confidence & Self Esteem. Free Cock Ring Included! A: this professional-grade maximizer worx VX3 which measure 2.68 inches wide, 11.2 inches in total length and accommodating 7.8 inches in penis length. B: Powered by 3AAA batteries( not included). It cycle between three speeds of suction .included with a Bonus penis ring.