#1
please note: even though the following link is from ebay im not selling or promoting the sale of the item but just asking a question about it.

is this a channel selector?
it doesnt really specify well enough

http://cgi.ebay.co.uk/GUITAR-FOOT-SWITCH-PEDAL-SOUND-EFFECT-CONTROL-NEW_W0QQitemZ140278854249QQcmdZViewItem?hash=item140278854249&_trksid=p3286.c0.m14&_trkparms=72%3A1301%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318

also will it work ok with my roland cube?

please note that i know its cheap but its all i can really afford.
#2
It could work as a channel switcher. There are many differnt types. However, based on the description it would be the most common form for a mono switch. Some units hoever use a momentary switch, this is latching
Main Rigs
Guitars
Thineline tele with SD lil '59

Ibanez Artcore AM-73

Line 6 Variax 500


Effects

Line 6 X3 live
Digitech RP-500
Ibanez Weeping Demon


Amps
Roland JC-120
Rocktron VT-60