Photo 1 of (UNABLE TO TEST TOTAL FUNCTIONALITY) Fosi Audio P2 Headphone Amplifier Vacuum Tube Headphone Amp Mini Hi-Fi Stereo Audio with Low Ground Noise Output Protection

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Photo 1 of (UNABLE TO TEST TOTAL FUNCTIONALITY) Fosi Audio P2 Headphone Amplifier Vacuum Tube Headphone Amp Mini Hi-Fi Stereo Audio with Low Ground Noise Output ProtectionPhoto 2 of (UNABLE TO TEST TOTAL FUNCTIONALITY) Fosi Audio P2 Headphone Amplifier Vacuum Tube Headphone Amp Mini Hi-Fi Stereo Audio with Low Ground Noise Output Protection