50 Hrs Playtime and Dual LED Display: Each earbud lasts up to 8 hours on a single charge, and up to 50 hours of playback with the charging case, giving you an exceptional long-lasting experience. In addition, the in-ear wireless Bluetooth headphones are equipped with a smart LED display that visually shows the power level

Bluetooth 5.4 and One Step Auto-Prairiing: The wireless earbuds utilize the latest Bluetooth 5.4 technology for more stable transmission and longer range, providing you with an uninterrupted call and music experience. After the first pairing, simply remove both wireless earbuds from the charging case and they will pair automatically

Superior Sound Quality and Clear Calls: The S66 Bluetooth wireless headphone with 13.4 mm graphene diaphragm delivers powerful bass, clear mids and bright highs, and ear buds with dual hybrid ENC microphones passively eliminates 85% of background noise for clearer calls

Smart Touch and IP7 Waterproof: The smart touch control of the headphones can perfectly fulfill your daily needs and bring more convenience to your life.Meanwhile, Bluetooth earphones have IP7 waterproof rating to withstand sweat, rain and light splashes, making them suitable for wearing while exercising and running

Comfort Fit and Lightweight: The S66 Bluetooth headphone and the charging case are compact and lightweight with a lanyard attached. It's small enough to slip in your pocket, or clip on your bag or keys–so you never worry about space. In addition, each in-ear earbud weighs only 4 grams, making it easy to wear for long periods of time