Energy Sistem Serenity Bluetooth earphones ANC

AudioANC – Noise reduction: -30 dBSpeaker diameter: 10 mmType: DynamicImpedance: 32 ΩLatency: 200 msFrequency response: 20 Hz ~ 20 KHzTHD (< 1%): YesANC – Frequency band: 20 Hz ~ 1 KHz ConnectivityVoice assistant (Google, Siri): YesBluetooth version: 5.4Bluetooth – Class: 2Bluetooth – Frequency band: 2.4 GHzBluetooth profiles: A2DP / AVRCP / HFPBluetooth range: 20mCompatible Bluetooth codecs: AAC / SBCBluetooth – Maximum output power: < 20,00 dBmTWS technology: Yes BatteryCharging system: USB type-CType: LiPoCapacity: 40 mAhVoltage: 3.7 VBattery life – Normal use: 5 hBattery life – ANC ON + MUSIC ON: 5 hCharging time: 1 hCharging case: YesType (charging case): Li-PoCapacity (charging case): 500 mAhVoltage (charging case): 3.7 VBattery life (charging case): 20 hCharging time (charging case): 2 h Microphone : Hands-free: YesMicrophone – Type: Built-inMicrophone – Sensitivity: -38 dB ± 3 dBFrequency response: 100 Hz ~ 10 kHzENC: Yes Power supply :Connector: USB type C Compatibility: Mac / PC Windows / Smartphone / Tablet / TVPlayback control: YesVolume control: YesIPXX certified: IPX4Splashproof: Yes Size and weight:Height: 50 mmWide: 64 mmDepth: 25 mmWeight: 40 g