Function: 10 Frequency Vibration
Color: Black
Inner Dia: 4.2 cm/1.6"
Outer Dia: 7.3 cm/2.9"
Net Weight: 79 g/0.17 lb/2.8 oz
Power: Lithium battery
Material: ABS + Silicone
Package: OPP Bag
Further: Waterproof
Package Size: 13.5*10*6 CM