OnePlus Bullets Wireless Z2 Bluetooth Neckband Earphone

Frequency: 20Hz – 20,000KHzImpedance: 32ΩSound level/Sensitivity: Driver Sensitivity: 114±3dB@400Hz, 109±1dB@1000HzConnection Type: WirelessMicrophone: YesBattery:  220 mAhBattery charge method: USB Type-CBattery Life: Up to 30 Hours (50% volume)Fast Charge: 10 mins for 20 HoursControls: Magnetic controlWater/Sweat Resistance: IP55Fast Pairing: Only supported on OnePlus smartphonesSmart Assistance: YesBluetooth version:  5.0Drivers: 12.4mm dynamic driverWeight: 26.65g