Function:7 Modes Vibration/MemoryMaterial:SiliconeColor:BlackPower:USB ChargingCharging Time:60 minutesBattery Life:40 minutesFurther:IPX5 WaterproofProduct Size:121x56mm/4.76x2.2 inchesRing Size:34/45mm/1.34/1.77 inchesPacking Size:165x110x60mm/6.5x4.33x2.36 inchesPacking:Color BoxPackaged...