Package Included:<br />1*6J5 Vacuum Tube Headphone Amplifier<br />1*Audio cable<br />1 AdapterA free adapter Must be buy in your country，We have not equipped<br /><br />Specification:<br />1.Model:A1-2016<br />2.Name:Earphone Amp<br />3.Tube:6J5*2<br />4.Dimensions: 100 * 70 * 24MM<br />5.Frequency response: 20HZ-25KHZ<br />6.Headphone Impedance: 32-300 ohm<br />7.SNR:> 100db<br />8.Channel separation <-100db<br />9.Distortion: <0.003 〓<br />10.Input and output: standard 3.5mm interface<br />11.Equipped with a dedicated power supply:<br />12.Input:85-265V~ 50/60Hz<br />13.Output:6.3V 2A ，÷24V 500mA