タイトルまたは説明

Most greatly saturated acoustic pressure level: **9dB*4Db Man Dangsheng increases: ≥*8dB harmonic distortion: When f<***0Hz ≤*5%, when f>***0Hz ≤*0% frequency response: Should not narrowly in the **0Hz~***0Hz equivalent noise: ≤*0dB suits the crowd: The loss of hearing moderate and the specific weight crowd produces has the major and medium small three mushroom silica gel ear plug, and a battery charger this product may charge. Product specifications: Power Supply:Rechargeable Battery Voltage:3.7VDC Operating Current:<=*6mA+/**0% Speaker Impedance:**0 ohm Output Power:3mW Unit Weight:*0g(including built-in rechargeable battery)