The app-controlled F2S endurance trainer and masturbator is here to revolutionise male pleasure and provide limitless enjoyment with its open liquid silicone design. We believe that sexual performance is like any other ability. To realise its full potential, you have to go through many stages of progression before you master it. That's why, when connected to the Lelo app, the F2S transforms into the ultimate endurance trainer with two specially designed exercise programmes. The endurance trainer helps you to increase your stamina and experience stronger orgasms. The guided pelvic floor exercises for men help you to achieve a more satisfying sexual performance. App-controlled stamina trainer - Use the stamina trainer or the guided pelvic floor exercises for men to improve your sexual performance. You can also unlock six additional vibration modes that are exclusively available via the Lelo app. Interactive AI mode - A performance sensor integrated into the F2S sends encrypted information in real time based on the movement of the device. The interactive AI mode in the Lelo app then synchronises the intensity and movement sequences perfectly with the movements of the device. Liquid silicone. This real-feeling material is the embodiment of softness, elasticity and durability. It not only adapts to your needs, but also provides a more intense experience. Fourteen powerful pleasure settings. The product itself has eight settings - you can unlock six more modes with the Lelo app. Self-adjusting liquid silicone lamellae. The newly developed silicone fins allow airflow, prevent the formation of air bubbles and provide additional stimulation at the same time.