Pedal (T-Rex) T-Rex MollerNew old stock.  Actual photos of item shown. Serial MR1139

I've had a Moller on my pedal board for many years, and it has been superb.  Boost or light gain - or both at the same time.  I did have to replace the push-push voice switch with a mini toggle.  Wore it out, but was an easy fix.  I believe the newer version has a better switch, but otherwise same electronics.  I love this pedal.  Simple.  Usable.  Performs exactly as expected.  

Manufacturers Description:
T-Rex classic overdrive pedal with clean boost. COCKTAIL ANYONE?   stunning clean sound with just a little dirt around the edges? solid overdrive with a tablespoon of clean sparkle to make your distorted chords stand out?  fire-breathing distortion with just a dash of clean signal for better definition?

Choose your flavour - MOLLER blends it all.. MOLLER is a classic overdrive pedal that provides a wealth of dynamic overdriven tones with superb tonal control, as well as separate transparent 0-20 db adjustable and switchable clean boost, and a unique overdrive/clean mix option. The mix knob lets you dial in the perfect balance between distorted and non-distorted signal. Rolled all the way up and with distortion maxed too, the pedal sounds just like an old tube amp on full volume. Roll the mix knob back a bit, and your clean signal starts to get through, meaning that if you pick lightly, or roll back the volume on your guitar, you get a stunning clean/softly clipping sound that retains all the feel and dynamics of your original tone, only bigger, louder and richer.The boost function lets you dial in a solo level, whether the overdrive circuit is activated or not.

Features
TONE: Adjusts the flavour of overdrive
GAIN: Controls the amount of overdrive. This pedal has lots of body, even with Gain turned down.
MIX: Blends distorted (wet) and non-distorted (dry) signal
BOOST: Determins the amount of boost, from 1 - 20 dbLEVEL: Adjusts the output volume
VOICE: This pedal is tuned to fit all types of pickups, from Humbucker to single coil. Hit the VOICE button and hear the difference.

Origin
The Moller was developed in 2003 for a well known danish guitarist called Knud Moller. He plays guitar for Johnny Madsen and has also made solo albums.He needed a good tube screamer with a clean boost. So T-Rex made him that pedal based on the Alberta. Other danish players heard and saw the pedal, and they also asked for one. So demand increased, and T-Rex decided to improve the pedal and produce it. In the process, T-Rex named the pedal Moller after Knud Moller.