- Multi frequency vibration 
- 360 degree curve 
- USB charging 
- Waterproof 
- Mute 
- ABS material 
- Strong shock motor 
- 12 frequency vibration mode 

Description: 
- Material:Silicone,ABS 
- Power supply:USB charging 
- Waterproof:Totally waterproof 
- Size:Length:Shown 
- When charging,the LED light flashes,2 hours fully-charged.