Alexander do tasty stuff, I'm a fan of their work. This is a tremolo, with some fun additions: a tap tempo function, a mix control and a vibrato mode. It's a beautiful sounding box, especially the harmonic tremolo. Heck yeah Alex. 

Model: Alexander Pedals Equilibrium DLX
Made: Garner NC, USA, recent model (serial EDX6020)
Type: tremolo/vibrato
Power: standard 9v negative supply, 
Switching: buffered bypass
Equivalent new street price (approx): $375aud
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks, fully functional. Overall: excellent condition