Energy Sistem Style 2 Bluetooth earphones ( Black).Guarantee 3 years !

Wireless earphones with 20 hours of battery life thanks to Bluetooth 5.1. Enjoy the most powerful sound with Deep Bass. With a compact charging case to take them anywhere. Stereo calls. USB Type-C charging connector. AUDIOFrequency response: 20 Hz20 kHzDriver diameter: 8 mmMaximum power: 5 mWIn-ear designType: dynamic CONNECTIVITYBluetooth 5.1, class 2Frequency band: 2.4 GHzMaximum output power: < 20.00 dBmCompatible Bluetooth profiles: HSP / HFP / A2DP / AVRCPSupported audio codecs: SBC / AACUp to 20 m distance rangeTrue Wireless function with auto-pairingHands-free functionVoice assistant compatible with Google/Siri MICROPHONEType: built-in microphoneSensitivity: -42 dB ± 3 dB (@1 kHz)Frequency range: 10 Hz ~ 10 kHz BATTERY Earbuds:Capacity: 30 mAh (each earbud)Type: lithium-polymer batteryBattery life at medium volume: 5 hours*Charging time: 1.5 hoursChanging method: charging caseCharging case Capacity: 300 mAhType: lithium-ion batteryCharging time: 1.5 hoursCharging method: USB Type-C