A "manual toothbrush" is a regular toothbrush that you use with your hands to clean your teeth. It does not have any electric or automatic functions. Full definition
This «smart» toothbrush removes up to 100 % more plaque than a regular manual toothbrush and offers up to six different cleaning levels. (makingtimeformommy.com)
There's plenty to be said for the classic manual toothbrush: It can't run out of batteries and it's compact, lightweight, and portable. (businessinsider.com)
Most dentists recommend electric toothbrushes over manual toothbrushes for humans. (pethelpful.com)