Steps for use: Step 1: Open the battery compartment Step 2 : Install one AA battery Step 3 : Rotate the bottom boot to the left (Note:Not rotate the battery compartment) Step 4: Apply skin cream Step 5 : Lift with the beauty bar Attention: ①This product requires one AA battery (not included). ②When installing the battery with the positive terminal out (the raised end of the battery), pay attention to whether it is installed correctly. ③Some brands of rechargeable AA batteries are too large, if you are unable to fit the batteries into the unit, please replace them with other brands of AA batteries.