This is a PRE from LAND DEVICES. I purchased this when it was sold as a limited edition in 2021. The PRE is an always-on preamp based on the Echoplex, and can be used with 9V to 12V. You can adjust the saturation with the knob, and switch between two settings, dark and bright, with the green switch. It shows signs of use, but is in relatively clean condition. All original accessories are included. Thank you.