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You need a new choice, a cool attitude! 【Product specification】 Speaker size:50mm Microphone impedance:2.2KΩ Directionality:omni-directional Impedance:32Ω±15% Sensitivity:105±3dB Cable length:2.1M±0.15 Frequency range:20Hz-20KHz LED working voltage:DC5V±5% Microphone:6.0 X 5.0mm Working current:≤500mA Microphone sensitivity:-38±3dB Headset jack:USB + 3.5mm 4Pin 【Matters needing attention】 1. Please enjoy music at a moderate volume to prevent adverse effects on the hearing. 2. Please be careful to wear when driving or cycling so as not to affect safety. 3. If you encounter any problems during use, please contact us in time.