Package included :
2PCS philip NOS DL92 vacuum tube in box
1PC Xz-U2012 black Tube USB DAC
1PC Power supply
1PC gold-plated USB cable
1PC 1/4" male to 1/8" female audio adapter
Xz - U2012 black tube USB DAC mini headphone amplifier complete decoder - SN
Amplifier Type: Tube + VMOS A Class enlarge
Output power:> 500mW
Frequency response: 20Hz-35KHz
Headphone Impedance: 32ω-300ω
SNR:> 90dB
USB Input: CM108 supports USB 2.0
DAC: TDA1305T
Line Input: 3.5mm stereo jack
Headphone Output: 6.35mm stereo jack / 3.5mm stereo jack
Dimensions: 132mm * 83mm * 65mm (excluding protrusions)
Support System: Win2K, Win XP, Vista, Win7 (32/64), Win8, Mac OS X
Weight: 520g
Power:
Input voltage: AC110-240V 50-60Hz
Output voltage: DC24V 1000mA
Weight: 210g