mini microphone mini portable vocal/instrument microphone mobile laptop notebook and singing... yumomuy specification:<br> product name: mini microphone<br> material: aluminum alloy<br> purpose: singing on mobile phone; network recording<br> suitable for: most mobile phones, computers, tablets, etc. condenser microphone unidirectional<br> frequency response range: 30hz~20khz<br> output impedance: <200ω<br> sensitivity: -30db +/- 3db (0db = 1v / pa at 1khz)<br> power supply: 3v<br> interface: 3.5m (used with any device equipped with 3.5mm)<br> cable length: ~1.5m<br> package:<br> 1 * mini microphone<br> 1 * sponge cover<br> 1 * bracket