Vintage Electro Haromix LPB-1 with very, very rare graphics.

Tested and working well. Comes with a new battery inside. Plug and Play!

Will not fit every amp without using an extension cable. Does plug in and work will with my silverface vibrolux on the reverb channel.

If you know what this is, then you don't need me to explain it. But if you don't, I'll elaborate briefly. Contrary to the product model name, there is nothing "linear" about this. This is, in reality, a first generation distortion pedal. It uses a single transistor biased in near cut-off to softly clip the bottom half of the waveform while providing over 20dB of gain to the rest of the signal. The clipping operation provides oodles of even harmonic distortion mimicking tube distortion. The gain will overdrive the input of your typical tube amplifier. As such, you can go from gentle grit to full blown hair raising distortion by twisting the boost button. The combination of the class-B boost amplifier distortion with your amp distortion to give you a very unique overdrive tone.

This unit has graphics that I've never seen in other EH LPB-1 boxes. Pretty rare.