Basic Dog Foot Cleaner does not contain battery. By rotating the Basic Dog Foot Cleaner to achieve the cleaning effect. The product is easy to disassemble and clean. You only need to unscrew the top cover and take out the inner silicon brush in the basic dog foot cleaner, and you can rinse it off with water.This Basic Dog Foot Cleaner also has good quality. At present, our customers who are selling this product have feedback that this product totally has no after-sales problems