No need to buy extra batteries,Includes button batteries.

Specification:
Material: Silicone
Battery Type: Button battery
Waterproof?No smell

Powerful Double Vibration
Discreet packaging.

Product Features

• Experience Ânãl pleasure at your own convenience, as often as you want.
• 10 different powerful vibrating mode can help to improve energy and concentration. Perfectly extend the time and strength.
• Body-safe silicone material close to the skin, safe use.
• Easy to clean before and after use, waterproof, enjoy your bath, shower or spa time.
• Discreet Package, definitely a best gift for boyfriend or husband; make your life much more interesting