Description: 1. Bluetooth version: V5.3 EDR 2. Battery capacity of charging bin: 300mAh 3. Headphone battery capacity: 30mAh 4. Standby time: 400H 5. Duration: 28 hours in totalCooperate with the charging case 6. Output power of charging chamber: 5V/100mA 7. Talk time: 6H 8. Headphone charging time: 0.5H 9. Working distance: 10-20m (barrier-0 straight line) 10. Charging interface: Type-C Specifications: 1. Connect immediately after opening the cover 2. HIFI sound quality 3. Strong endurance 4. Comfortable to wear 5. Low latency 6.Supports previous/next track:For detailed usage, please read the product manual carefully. Package Included: 2 * earphone, 1 * charging compartment, 1 * data cable, 1 * instruction manual4*Headphones in-ear silicone cover