This Silicone Kegel exerciser is great for advanced users because of its slightly smaller size and easy retrieval cord. It features 12 intense functions of vibration, pulsation, and escalation. A state-of-the-art memory chip inside the kegel ball resumes to the last function used so you can continue from where you left off. <br><br> Rechargeable. Includes USB charging cable. Complete charge in 60 minutes. Runs for 40 minutes on high speed and 60 minutes on low speed. <br><br> Measurements: <br> 2.75" x 1" / 7cm x 2.5cm (Ball)