Specifications: Color:as the pictures show Application: outdoor, home, office Each host computer needs to be equipped with 2 No. 7 batteries(not include), the product is a one-time plastic packaging, with a dust film, can be used to install the battery Use Method: 1.Install the stimulator. 2.Tear off the patch from the film. 3.Paste to the place where you need to exercise. (Note:After using,need to paste the patch to the film) How to clean the gel patch: 1.Dip the water with your fingers and wipe the surface of the gel. 2.Put it in a well ventilated place to dry. Note:Do not carry out maintenance for a long time or frequent, otherwise it will lead to shortened service life. "