Material: PlasticCategory: Earphones & HeadphonesCharging Method: CableDriver Diameter: 40mmImpedance Range: up to 32 ΩBluetooth Version: 5.0Is wireless: YesSupport Memory Card: YesResistance: 32ΩFrequency Response Range: 20 - 20000HzActive Noise-Cancellation: YesVolume Control: YesControl Button: YesVocalism Principle: DynamicWireless Type: bluetoothConnectors: 3.5mmCommunication: Wireless+WiredStyle: HeadphoneCertification: RoHSOrigin: Mainland ChinaBrand Name: NoEnName_Nullmodel: P47USB charging: DC5VINSignal-to-noise ratio: 88DbBluetooth distance: 10moutput power: 35mWCharging time: 2 hoursTalk time: 4-6 hoursStandby time: 18 hours