Ultra small but stable - Each invisible earbud measures 0.23 inches and weighs 0.1 ounces, making it the smallest invisible Bluetooth headset. It is designed for long wear comfort, including for users with smaller ears. The ergonomic design fits the cochlea, stays in place, and is waterproof, making it a good choice for workouts. Long-lasting and durable - Comes with a 350 mAh charging case that recharges the micro earbuds up to 3 times. After a full charge, the invisible earphones provide up to 36 hours of listening time for music or calls, with standby time up to 140 hours. This supports extended use away from home without frequent charging. High-fidelity sound and active noise reduction - Hi-Fi sound quality with cinema-level sound effects, tuned by a professional acoustic team to enhance mid and high frequencies. True active noise reduction allows you to enjoy clear music outdoors. Stable connection - Bluetooth 5.0 provides a stable connection with minimal interference. The mini wireless earphones can be used up to 30 meters away from the phone. Touch to play and easy pairing - Touch controls allow you to change tracks, pause/play, answer/end calls, activate voice assistant, and more. When you turn on your phone’s Bluetooth and open the charging case lid, the earphones automatically connect and pair. They support dual-ear use, and you can place one earbud back in the case while the other continues listening. After charging, remove the earbud from the case and it will automatically connect. Practical use scenarios - Exercise and sports: secure, waterproof design and lightweight form for running, cycling, and gym workouts without slipping. - Commute and travel: long battery life, hands-free calls, and reliable wireless range for everyday use and on-the-go listening. - Work and casual listening: automatic pairing, simple touch controls, and clear, noisy-environment performance for calls and media in outdoor or indoor settings.