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*Note: Built-in microphone, only supports Bluetooth voice call mode, does not support mobile phone voice assistant dialogue, WeChat voice, QQ voice Specifications: Battery: Built-in 3.7V/1800mAh rechargeable lithium ion polymer battery Applicable system: Win7, Win8, Win10, Mac OSX, I0S, Android system Output power: 300mW (32Ω load) Frequency response: USB/Bluetooth: 20Hz-20kHz (±0.5dB) AUX: 10 Hz-100kHz (±0.5dB) USB support sampling rate: PCM: 16-32bit/44.1-384kHz DXD: 24-32 bit/352.8-384kHz DSD: DOP/NATIVE mode, DSD64-256 Bluetooth support sampling rate: 16-32bit/44.1 -96kHz Bluetooth support formats: SBC, AAC, aptX, aptX LL, aptX HD, LDAC, LHDC Gain: +3/9dB Signal to noise ratio: 115dB Separation: ≥75dB Charging time: ≤ 3 hours Harmonic distortion USB: 0.001%@1kHz Bluetooth: 0.002%@1kHz AUX IN: 0.0009%@1kHz Size: 105*55* 15.6mm Weight: 142g