Phiaton BT 390Wireless Compact Headphone Music and Call Function Foldable Design Multi Point Connection Both Android & iOS Devices Everplay X cable when Bluetooth not available or battery run out Specification Bluetooth Version 4. 1 Driver Unit: 40mm Frequency Range 20Hz~27kHz Impedance: 32ohm Sensitivity: 102dB mW Operating Range: Within 10m 33ft Call Time: 29hrs Music Play Time: 30hrs Standby Time: 630hrs Full Charge Time: 3. 2hrs Weight: 140g(0. 31lbs)
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