The unique construction of The Strength heightens pleasure by constricting the flow of blood. – Unique construction. – Powerful 3-speed vibrating bullet. – USB rechargeable battery. Our Nauja and improved Elastomex TM formula, combined with a small yet powerful, 3-speed vibrating bullet allows you and your partner to feel every vibration. Designed with enhanced stimulation in mind, the Bathmate Vibe Ring range will boost your power, performance and pleasure. For best results leave to charge in direct sunlight for 5 minutes.