It comes on with the key but I wired up an illuminated power switch (on the right ) by tapping into the tail light hot wire to the ignition switch and wiring in a blocking diode so the tail light would not come on when i flip the switch on.
I wish it got more FM stations but overall i'm happy. I used cut sections of honda metropolitan radiator hose for the mounts that as you can see I put the speakers on the windshield mounts. I mounted the unit itself in the glovebox as you see.
It has a keychain FOB and I have no problem hearing it in 45 mph zones.