With double earbuds weight under 5g, the BOYA BY-AP1 is your most compact and comfortable True Wireless earbuds. You can select the most suitable earplug for yourself from 2 different sizes in the packaging, and start a enjoyful moment of music whenever you are in sports, traveling or staying alone with yourself. Designed to best compatible with your ear structure, and avoid falling off accidentally in movements. The BY-AP1 owns a 6 hour battery life and it's charged by an included charging case. All together it offers you up to 22 hours playing time, which long enough for you to travel all day long with music's accompany. When you go outside with light packs, BY-AP1 will be your favorite tool because it's designed with super lightweight and compact size for putting in your back pocket.