How do I install a GE 60 Minute Timer Wall Switch?

I bought a GE 60 minute in-wall Timer Switch from Home Depot and want to install it for my bathroom exhaust fan. Coming from the box in the wall are one black wire, one white wire and a bare copper wire. The GE switch has a Black ,Red , White , and Green . Which wires do I connect? Or do I need to get a different... show more I bought a GE 60 minute in-wall Timer Switch from Home Depot and want to install it for my bathroom exhaust fan. Coming from the box in the wall are one black wire, one white wire and a bare copper wire. The GE switch has a Black ,Red , White , and Green . Which wires do I connect? Or do I need to get a different wall switch ? I'm Replacing a Intermatic Heavy-Duty Digital 7 Day Wall Switch Timer SS7C that was installed when they built the house . The Intermatic model had Blue, Black and Red wires , and the Red Wire was disconnected .
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