Firefly Batman Skinny Turbo Toothbrush.
1. Unscrew the bottom from the brush. 2. Insert battery with correct polarity. 3. Push bottom button to begin brushing. Push again to run off the toothbrush. Attention: brush will not work if the battery is installed incorrectly. To start: push bottom on bottom of brush. To stop: push button again.
Always refer to the actual package for the most accurate information