The Blackstar HT-DUAL Pure Valve Distortion is a versatile, high-voltage tube distortion pedal designed to act like a portable two-channel preamp.
It utilizes a real ECC83 (12AX7) twin triode valve running at an internal 300V high-tension circuit to deliver authentic, amp-like dynamics and tube warmth.

Key Features & Internal Circuitry
Genuine Tube Operation: Features a 12AX7 tube running at a true 300V high-voltage rail for authentic breakdown and organic compression.
3-Channel Flexibility: Features two independent channels, effectively turning a single-channel amplifier into a 3-channel setup.
Infinite Shape Feature (ISF): Blackstar’s patented EQ control shifts the tone response seamlessly between tight, scooped American metal and warm, mid-focused British rock.
Speaker-Emulated Output: Includes a dedicated line-level output voiced for direct recording or plugging straight into a PA system.
Heavy-Duty Construction: Built inside a rugged, weapons-grade metal chassis with high-integrity silent buffered switching.

Killer dual preamp pedal.
Includes the original 22V power supply.
Out of Production. New it sold for $249+
Mine is like new in the box.

I prefer cash in hand sales so if you're local I can do a better price.