ENC:Environmental Noise Cancellation HD Stereo Sound ,Lossless Audio Sweat Proof IPX5.0 Voice Assistant (Google & Siri) Multiple color options Bluetooth chip : Bluetooth version :BT5.3 Frequency range: 2.4-2.48Ghz Transmission distance :Up to 10? Battery capacity ( headphone):25mAh Battery capacity(Charging box):200mAh
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