- Unit: 8MMPU+PEK+Titanium composite diaphragm chip:8962B Bluetooth: 5.2 Bluetooth distance: 20m Noise reduction: ENC call noise reduction Support agreement:aptX-adaptive/AAC Sensitivity: 103db(±1) Impedance:16Ω Frequency range: 20-20000Hz Eardphone battery life:11h Charging compartment battery life: 45H (450mAh)