The Silhouette S17 is an ergonomically curved, body forming premium Silicone massager. Features dual motors with 10 incredible functions of vibration, pulsation, and escalation. Intense incremental speed control allows you to find the perfect speed for you or your partner. USB rechargeable, includes charging cord. Completely charges in 2 hours. Massager will run on highest speed for 40 minutes and on lowest speed for 2 hours. Shaft measures 4.5 inches by 1.25 inches. Stimulator measures 2.5 inches by 1.25 inches.