Technical details, maintenance and user manuals of our products are available in the images. we kindly ask you to make a record of the damaged products with the cargo personnel. return, exchange question & there is a communication envelope inside the products for suggestions, you can contact our after-sales services unit. minimalist designs unique colors high standards. use in healthy days. more than 100 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.