Information about this product 40 HOURS PLAYTIME: The earbuds can play for over 6 hours on a single charge and a total of 40 hours with the 400mAh battery charging case. Digital LED Display: The LED digital display on the outside of the true wireless earbuds housing is used to display the battery level of the charging case and earbuds. The number light will flash from 1 to 100 while the charging case is charging. IPX7 Waterproof: The wireless earbuds have an IPX7 protection rating, and the nano-coating on the surface of the earbuds prevents water and sweat from entering. Great for sports and travel. Bluetooth 5.2 & One-Step Pairing: The earbuds feature 5.2 radio technology and automatically connect to the last paired device when the case lid is opened. These earbuds are compatible with iOS or Android IMMERSIVE SOUND AND LIGHTWEIGHT: The sports earphones feature a unique stereo design and a large 13mm composite diaphragm for powerful sound. A single earbud weighs only 4g, and the total weight of the earbud charging case is 40g, making it easy to carry.