Dual-Head Structure, Detachable Design. The earbuds cleaning pen combines three functions in one portable gadget with each part playing its role. Switch the head to use a flocking sponge, high-density brush, or metal tip, dealing with different cleaning tasks. Furry Sponge for Thorough Cleaning Made of furry flocking fabric, the soft sponge reaches deep into the wireless charging cases and wipes clean all the dust and dirt. Tip: you can spray a small amount of alcohol onto the surface to strengthen its cleaning power and Wash the sponge in water with a cleaning solution after it becomes dirty. Soft Brush for Effortless Cleaning A high-density brush helps clean up the dirt accumulated in the sound outlet holes gently without doing any damage to your earbuds. Regular cleaning keeps your earbuds clean and sanitary and eliminates the negative effect on their performance. Metal Tip for Tough Cleaning Work Same as the pen tip, the cleaner pen protects the cleaning surface with a round-headed tip, getting deep into the hard-to-reach dead corners and scraping up the stubborn dirt effortlessly. Make sure an all-round cleaning and leave no dirt to survive. Simple Operation, Easy Transportation All you need is to rotate and pull out the inside part to change for the head you need. Carry and store the cleaning kit with the wireless charging case in case of need.