Product Details:1. Talk time: about 30 hours after listening to the song2. capacity: 300mAh battery3. Bluetooth solution: Jie Li solution Bluetooth 5.04. Transmission distance: 10 meters without obstacles5. Charging time: about 2-3 hours6.Double-click the phone key7.Caller ID8. Impedance: true copper ring speaker impedance 32ΩPackaging Information:1*L9 Headset