Connector: XLR three-pin card male/female Frequency range:20Hz-20KHz Recommended impedance load: Greater than 1k Ohms Sampling rate: 24-bit/48 kbps Audio Maximum output level: 9uv(A) Gain improvement: +30DB Power supply: 48V phantom power Impedance:1350hms Current consumption:is 110dB Performance to noise ratio: 3.0mA Weight: 320g(11.28oz.) Input to maximum level: 8.3dBV/2.6V (0.5%THD@1kHz) Dimensions: Width 20mm (0.75in.) Height: 95mm(3.76in.) Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Material: Metal colour: blue Package Contents: 4 x Mic Preamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.