Overall, the Tenga Vacuum Gyro Roller is a unique sexual device that combines suction, vacuum, and stroking motions to deliver a one-of-a-kind experience. The automatic vacuum pump and gyroscopic-sensor-controller rotation make it easy to customize the experience to individual preferences. Product Dimensions In addition to the vacuum and suction features, the device allows for stroking motions, further enhancing the experience. The device has two different vacuum strengths (low and high), four rhythmic vacuum patterns, and an automatic gyro sensor that allows users to find their perfect rotation speed by simply turning their wrists. The Tenga Vacuum Gyro Roller's automatic vacuum pump is a type of positive displacement vacuum pump which expands a cavity to allow gases to flow out of the sealed environment or chamber, creating a vacuum. This type of pump is designed to be reliable and efficient. Tenga Vacuum Gyro Roller; is a sexual device with an automatic vacuum pump for suction and a gyroscopic-sensor-controller for rotation. Combining these features delivers unique sensations unlike anything else on the market.