Double it, triple it... dang, go nuts and quadruple it. This is a cool little effect, it'll make your leads sound very large indeed. Even more fun in stereo if you dare. 

Model: TC Electronic Mimiq Doubler
Made: Thailand, 2018 (serial S181200420DDH)
Type: doubler
Power: standard 9v negative supply or battery (not included)
Switching: true bypass
Equivalent new street price (approx): $$199aud
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks. Overall: excellent condition