Material: Silicone Product Size: 80*42*51.6mm Large Circle Inner Diameter: 48mm Small Circle Inner Diameter: 28mm Battery Type: Rechargeable Polymer Lithium Battery Battery Capacity: 100mah Charging Time: 0.5 Hours Use Time: 1 Hour Vibration Modes: 5  Waterproof: Fully Waterproof Long press the "S" key to turn on/off; Click the "S" key...