Arcwave Pow is a premium manual stroker with suction control, textured CleanTech Silicone sleeve and dual entry. Pow's intuitive silicone tightens pleasurably during use, while the air pressure release valve creates intense suction for a new and incredible climax. Air pressure release valve tightens the silicone sleeve, creating a controllable, natural suction sensation without batteries. By placing a finger over the air pressure release valve during use, you can control the suction intensity exactly to your liking for a customizable, totally natural feeling. Keeping Pow fresh is simple. Arcwave's cutting-edge CleanTech Silicone is super smooth, hygienic and durable but is also very flexible to accommodate all penis sizes. Precision engineering gives this material a superior finish, as well as making it durable for continued use. Smart structure within Pow's inner sleeve optimizes cleaning and drying speed without compromising on those smooth sensations.? Pow has specially shaped lids designed to protect the toy when not in use as well as enable better ventilation for fast and hygienic drying.?