About Product:Factory original ultra quiet low power scan movement 1. use a section of fifth (AA) batteries, we recommend using a faux leaking batteries, better able to take care of your baby, extending service life. 2. Please replace low battery the battery to avoid battery fluid out of the damaged lens 3. our product mix of precision and avoid violent shocks, vibrations, away from high temperature, high humidity, strong magnetic and dusty and corrosive gases