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Type: Wireless headphone (with cord)Battery: 400mADriverUnit: 40 mmFunction: volume control, pause, Play device, MIC unctionStead by time: 100 hoursIt adopts 40mm-HiFi dynamic coil speaker with high dynamic sensitivity, high fidelity and other characteristics.Support AAC/SBC advanced audio decoding mode, enjoy the professional-grade music sense of bass, thick and boring / medium-frequency level clear / high-pitched.Play time: 18 hoursFrequency Response: 20 Hz-20KHzCord length: 1. 2 m=10%Connector: 3. 5 mm stereo plugSensitivity: 114dab/mWAudio source: communication equipment