Top-Quality Audio: Lets fit wireless earbuds with 5. 8mm dynamic speakers deliver vivid and high-resolution sound, letting you appreciate all the details of your music One-Step Paring: Bluetooth5. 0 fast and stable transmission without tangling. Bluetooth earbuds are on and pair with each other automatically when taken out of the charging case and they connect back to the last paired device automatically 20-hour Work Time: 3. 5 hours of continuous playback wireless earphones and 16. 5 hours of backup power from the charging case, enjoy music without recharging during a full day of work Sweat- and Weather-Resistant: IPX5 water-resistance Bluetooth headphones withstand your most intense workout; sweating it out in the gym or running through the rain Comfortable and Secure: Ergonomic and lightweight design fits comfortably and snuggly in your ear. 3 sizes of ear tip options provide individualized fit and comfort for all-day wearing What You Get: 2 X Earbud, 1 X Charging Case, 6 X Ear tip, 1 X Micro USB Charging Cable, 1 X User Guide. Hassle-free customer service: 7*24H email reply, 45 days return/refund, 12-month