1. Bluetooth 5.4 low latency, fast connection and stable connection. 2. ANC active noise reduction. 3. 300mAh capacity battery, 30 hours of long-lasting battery life. 4. Lightweight earplugs allow you to enjoy uninterrupted sleep. 5. Parameters: Charging case battery capacity: 300mAh Standby time: 140h Play time: 4h Charging time: 1.5h
