Bluetooth chip: V5.1 Transmission distance: ≤ 10m Talk time: 6 hours Music playback time: 10h (70% volume) Impedance: 32Ω Sensitivity: 113±3dB Signal to noise ratio: ≥ 85dB Frequency response range: 20Hz-20KHz Horn specification: 40mm Transmission range: within 10 meters Battery: 200 mA Working hours: 10 hours Charging time: 2 hours Colors: blue, green, Khaki, pink, gray Packaging content: 1pcs earphones 1 pcs charging cable 1pcs audio cable