Review on 🎛️ TOPINCN 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Preamplifier Musical Fidelity Kit AC12V 0.8A" - "TOPINCN 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Preamplifier Kit, Musical Fidelity, AC12V 0.8A by Olivia Turner

I have everything but I'm afraid to turn it on. Neither positive nor negative can be seen at the current input (peak ground or middle ground). There is nothing on the RCA jacks that identifies input or output. add nothing at all. So if I did something wrong due to my inability to read Mandarin and her inability to identify key information, it could literally explode in my face! I found another seller that came with a case, better capacitors and parts (like the ones shown in this addon) had more english print on the board for about $5, I wish I had gone with that seller. Complete false advertising from this seller. He photographed someone else's gear and then picked up an even cheaper router! Saved on spare parts, retained investment and guidance.