Technical SpecificationsWireless Version: 5.3Product Material: ABSSpeaker Diaphragm: PETCall Sensitivity: \(42\text{dB} \pm 3\text{dB}\)Headphone Battery Capacity: \(300\text{mAh}\)Call / Play Music Time: 20 hoursFrequency Range: \(20\text{Hz} - 20\text{kHz}\)Speaker Impedance: \(32\Omega\)Charging Voltage: \(5\text{V}\)Connection Distance: \(10\text{M}\)Supporting Agreement: HFP, HSP, A2DP, AVRCP, OPP