The Volumizing Keratin Brush runs on two (2) AAA batteries. They are included with your brush.
Before use, install batteries by sliding open the blue battery-cover plate on the brush handle and install (2) AAA batteries. Replace battery-cover plate before operating brush.
Here's a quick video to show you how to put batteries into your brush:
We recommend replacing the batteries with either rechargeable AAA batteries or AAA alkaline batteries.
CORRECT DISPOSAL OF BATTERIES
Alkaline, single-use household batteries are typically not accepted recyclables in most municipalities. It is safe to dispose of alkaline batteries in your household trash. You may also take them to a local Home Chemical Collection Center or Household Hazardous Waste drop-off for safe disposal. Rechargeable batteries should be recycled according to U.S. federal guidelines.