I've never seen a dual footswitch tuner pedal before... but hey, just like Jon Snow, I know nothing. It's got a massive dual display and it's super accurate, plus you can have two inputs. 

Model: Korg Pitchblack Plus
Made: China, recent model (serial 015248)
Type: tuner
Power: standard 9v negative supply or 9V battery
Switching: true bypass
Equivalent new street price (approx): n/a (discontinued)
Mods: none
Accessories: no box or manual
Condition notes: used, no major marks, fully functional. Overall: very good condition