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1)Loudspeaker output: 2W(1KHZ,THD10%) 2)Sensitivity: ≥65dB 3)Loudspeaker Impedance: 4Ω±0.5Ω Diameter:(36/4Ω/2W) 4)Lithium battery capacity: 200 mAh 5)Lithium battery : 3.7V~4.2V+0.05V 6)Frequency ...