Edifier TWS NB2 Wireless EarbudsFeaturesBrand Name: EdifierVocalism Principle: HybridTechnology Control Button: NoActive Noise-Cancellation: YesCommunication: True WirelessVolume Control: NoStyle: In-EarSensitivity: 94dBWireless Type: BluetoothIs Wireless: YesSupport APP: YesImpedance Range: Up To 32 ΩConnectors: Type CHeadphone Pads Material: SiliconeBluetooth Version: 5.0Support Memory Card: NoWaterproof: YesFrequency Response Range: 20 - 20000HzOtherFunction: For Video GameFunction: For Mobile PhoneFunction: HiFi HeadphoneFunction: SportWith Microphone: YesFeatures: WaterproofFeatures: With MicrophoneFeatures: Active Noice CancellingCharging Method: Charging CaseCrazy Battery Life9+23 Hours For Normal Playtime7+18 Hours For Noise Cancelling Playtime.Φ13mm Large Graphene Diaphragm Delivers Powerful And Punchy Bass.LDS Laser-Carving Antenna Offers An Ultra-Reliable Connection With Incredibly Low Latency Time.Edifier Connect App For Fast Multiple Controls.IP54 Splash And Dust Resistance To Keep Your TWS NB2 SafeEdifier TWS NB2 Wireless EarbudsThe TWS NB2 Has Elevated Its Noise Cancellation To -40dB,30% Deeper Than The Previous Generations Of Edifier Headsets. True Wireless Earbuds With Hybrid Active Noise Cancelling Technology, Quick Ambient Mode Enables You To Hear The Environment Sound Such As The Traffic Or Flight Announcements, 10mm Driver With Composite Diaphragm Delivers Music With A Wider Soundstage, Dual-Mic Noise Cancellation Ensures The Clarity Of Phone Calls, With Wearing Detection, The Music Is Automatically Played/Paused The Moment You Insert/Remove Earbuds,The Left And Right Earbuds Have Master-Slave Switch Function For Mono Or Stereo Use, Personalize Your Settings And Find More Via EDIFIER CONNECT APP..