Function:7 Modes Vibration/MemoryMaterial:SiliconeColor:BlackPower:USB ChargingCharging Time:60 minutesBattery Life:40 minutesFurther:IPX5 WaterproofProduct Size:85x41mm/3.35x1.61 inchesInner Ring Size:40/28mm/1.57/1.1 inchesPacking Size:165x110x60mm/6.5x4.33x2.36 inchesPacking:Color BoxPackaged...