Microphone material:steel mesh + zinc; alloy tube; Frequency response:20 hz-20khz; Sensitivity:45 dB ± 1 db; Output impedance:150Ω ± 30% (1 khz); Load impedance:≥1000Ω; Equivalent noise level 16 dba; Current:3mA; Signal to noise ratio:78 decibels; Microphone output interface 3.5 mm; only have one mircophone ,1/4 - MODELO: BM800 | BM800 | MICROFONO + SOPORTE ESCRITORIO | | Cable length:2.5 m |