Wearing style : In-earVolume control: TouchControl unit type: In-line control unitRecommended usage Calls & Music3.5 mm connectorConnectivity technology: WirelessBluetooth version 5.0Wireless range: 10 mBattery:Standby time: 300 hBattery life (max): 10 hCharging source: USBInput voltage (charging case): 5.2 VBattery recharge time (charging case): 2 hInput voltage (earpieces) 4.5 VMicrophone:Microphone sensitivity: -58 dBMicrophone input impedance: 16 ΩMicrophone type: Built-inMicrophone frequency 100 - 10000 HzHeadphones:Headphone frequency : 20 - 20000 HzMaximum input power: 15 mWHeadphone sensitivity: 100 dBImpedance: 16 Ω