This Silicone Kegel exerciser is perfect for beginners thanks to its 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 balls 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 30 minutes on high speed and 50 minutes on low speed. <br><br> Measurements: <br> 3" x 1.25" / 7.5cm x 3.25cm (Ball)