Features: Vibration Function: The vibrating-ring provides intimate massage and stimulation for enhanced experience. Dual Stimulation Design: Features dual openings to meet various needs and increase comfort level. Premium Material: Made of medical grade silicone that is soft durable and skin friendly. Locking Technology: Helps extend usage time and improve overall satisfaction. Waterproof Cleaning: IPX7 waterproof rating allows easy cleaning and maintenance. Specifications: Material: Medical Grade Silicone Size: Diameter 4cm Thickness 1.5cm Power Supply: USB Rechargeable Include Battery/Charging Cable: Yes (USB Cable Included) Waterproof Rating: IPX7 Include: 1 * Main Unit 1 * USB Charging Cable 1 * User Manual Package Includes: