A-3 - The Original True Wireless Earphones - Open Design Comfortable Earbuds - Black Aluminum Charging Case - 5 Hours of Playtime - Bluetooth - Wireless & USB-C Charging

"Ergonomically designed to fit most ears, our custom shape ensures that you have comfort without compromise of style, the smallest and lightest true wireless earphones.

AUDIO THAT SPEAKS FOR ITSELF: Based on an open design with no ear tips, the A–3 is composed of 14.3mm high-end speakers, moving more air than other earbuds in its class."