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 * Durable metal box