Ensure strong erections with this automatic erection pump featuring a pressure gauge, allowing you to see, centimeter by centimeter, how your penis increases in size through the transparent tunnel and gauge. Additionally, the ring is made of high-quality TPR and is very comfortable. If you want to stop, simply press the release button and the pressure will quickly decrease. Features: Automatic erection pump with pressure and centimeter measurement, quick-release pressure system, high-quality materials: TPR, flexible ring for added comfort. Batteries: 3xAA.