1. Bluetooth version: 5.3 2. Chip: Jerry AC6973D4 3. Battery capacity: charging compartment 500mAh; earphones 40mAh 4. Use time: 7h 5. Standby time: 180h 6. Support master-slave switching and summon Siri 7. Ear-hook design, stable and comfortable to wear, charging compartment with digital power display