Quick DetailsCertification:ceIs wireless:YesWireless Type:bluetoothSupport Memory Card:NoVocalism Principle:Balanced ArmatureVolume Control:YesControl Button:YesCodecs:AACBrand Name:EternityModel Number:i9sStyle:in-earCommunication:WireLessUse:Portable Media Player, MOBILE PHONE, AVIATION, COMPUTER, dj, Gaming, sports, Audiophile, Travel, Professional, HEARING AIDFunction:bluetooth, waterproof, Noise Cancelling, MICROPHONEPlace of Origin:Guangdong, ChinaCord Length:wirelessBluetooth Standard:Bluetooth v5.0Waterproof Standard:ipx-4Active Noise-Cancellation:YESImpedance::32 OHMBluetooth version::Bluetooth v5.0+EDRBluetooth use frequency band::2.4GHzPower Level::CLASS IIOutput power::30mWBluetooth distance::15 meters barrier-freeFrequency response:20-20000HzLogo:OEM/ODMCharging time:1 hoursWorking time:2-4 Hours