Product parameters: Product Name: B9-TWS Charger Battery:300mAh Earphones:50mAh*2 Bluetooth version: second generation Bluetooth 5.0 Music / call duration: 4-6 hours Waterproof: IPX7 Charging box can charge the headset: 6-7 times Charging box capacity: 200mAh polymer lithium battery Headphone single ear capacity: 60mAh polymer lithium battery Sensitivity: 120dB Impedance: 32Ω Bluetooth transmission distance: 10meters Charging voltage: 3.7V Bluetooth decoder: ACC














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