Chip: JL6983D2 Driver: 14mm full-range Impedance: 32Ω Microphone: Round microphone, -42dB±3, earphone board with lithium protection Earphone battery: 401010/30mAh Charging case battery with protection board: 300mAh (771430) Charging port: Type-C Packaging dimensions: 135*90*30mm Carton dimensions: 47.5*30.5*38cm Volume: 0.05m³ Gross weight per carton: 13.5kg Gross weight per unit: 135g Quantity per carton: 100