Opened for inspection. Please note that the outer box may have some dirt or tears, but the contents are not affected, so please rest assured. 【Powerful Cleaning with Nano Bubbles】Make your daily laundry more comfortable! Generates over 2.1 trillion ultra-fine nano bubbles per 10mL, which thoroughly clean deep into the fibers through Brownian motion. Lifts and breaks down sebum, detergent residue, and water stains, providing reliable cleaning power even with less detergent! Makes your daily laundry more comfortable. 【Saves Detergent & Water! Eco-Friendly and Economical】Nano bubbles enhance the cleaning power of detergent, allowing you to cut usage by up to 50%! You can also reduce the number of rinses, which saves on water bills. Achieve more eco-friendly and economical laundry while eliminating waste! 【Cleans Even the Back of the Washing Machine Tub! Prevents Black Mold and Sliminess】The generated nano bubbles reach every corner of the washing machine tub, gradually breaking down and cleaning black mold, sliminess, and detergent residue! By preventing dirt in the washing machine tub, you can suppress unpleasant odors and achieve a fresh finish for your clothes. 【No Tools Required! Easy Installation】Simply insert it between the water supply hose and the water inlet! No tools are required, and anyone can complete the installation in just 1 minute! *When installing, tighten the screws securely. Install straight and firmly to prevent water leaks due to installation errors.