Powerful rumbling handheld massager with ridged surface for enhanced stimulation. Comfortable grip with extremely pliable design hugs every curve. 10 incremental speeds of vibration. Liquid Silicone: softer, smoother, durable and waterproof. State-of-the-art memory chip resumes on last function used. Security travel lock feature – hold for 3 seconds to turn on or off. USB rechargeable – charging cord included. Complete charge in 1.5 hours. Runs for 55 minutes on high speed and 80 minutes on low speed.