P81 Pro Max Features: Truly wireless JBL Signature Sound Handsfree calls Call mode Easy controls Comfort Stay Secure Fit Splashproof1. Power input: 5V/1A 2. Call duration: 3.5 hours 3. Music duration: 3 hours 4. Charging time: 1 hour 5. Headphone capacity: 50mAh 6. Charging capacity: 300mAh 7. Intelligent noise reduction, automatic connection, long-lasting battery life