Industry-leading Feed-Forward Active Noise Cancellation technology that offers you true freedom from background noise with enhanced audio quality. Large graphene diaphragm delivers a much deeper and punchy bass with the rich details of sound reserved, which makes TWS NB be distinguished from others.
Bluetooth range:15 meters
Impedance: 16 Ohm
Talking time:4- 5 hours
Battery Charge Time: About 1hour
Battery：35mAh x 2earbuds Box Battery：320mAh Earbud size：27*20mm