main FeaturesBrand Name: LenovoStyle: in the earPrinciple of pronunciation: dynamicActive Noise Cancellation: NoCommunication: TrueWirelessVolume control: YesCategory: earphones and headsetsCertificate: CENumber of connectors: 2Impedance range: up to 32 ΩSupports Memory Cards: NoWaterproof: YesFrequency response range: 20 - 20,000 HzWireless Type: BluetoothLine length: 0 mResistance: 32ΩIs Wireless: YesConnectors: Type-cBluetooth version: 5.0Charging method: charging caseApp support: noFunction: video game, common headset, mobile phone, Hi-Fi headsetWith microphone: yes