<b>This integrated tube amplifier is an one and done purchase! it has pre amplifier section and the power amplification in one unit.</b><br> <b>Easy and Convenient Operation: the front and back panel will show you a clear guide on how to control and operate this amp.</b> <br><br><b>Specifications:</b><br> Input Voltage: 110V /230V <br> Power Output: 2X30W (left and right channel)<br> Input Impedance: 100Kohm <br> Output Impedance: 4ohm,8ohm <br> Input Power:100W <br> Tube: 6L6G(5881)*4pcs,12AX7(ECC83)*2pcs,12AU7(ECC82)*2pcs<br> Frequency Response: 20Hz~20KHz<br> Distortion: 0.5% (1KHz)<br> Signalise Ratio:>= 86dB<br> Input:LINE1, LINE2, LINE3, AUX, USB/DAC , Bluetooth<br> Size:38cm*30cm*16cm (Length X Width X Height) <br> Weight:13Kg<br><br> <b>What are included in the packages:</b><br><br> I30bt Tube Amplifier *1 <br> User Manual *1 <br> Power Cable *1 <br> Signal line *1 <br> USB cable *1 <br> white gloves *1<br> Brush *1<br> Screw Driver <br> wiping cloth *1