Read the post below on Escort's forum. The M4 horn is VERTICAL in the iQ, with a 45 degree reflector. Reminds me of the old school remotes with a reflector in case you had to install the antenna 45 degrees off. Thoughts?
Component-wise, the detection circuitry is a 9500i/ix's M4, every component is the same except the horn itself. The M4 antenna sits inside the iQ vertically. The horn is re-designed with a 45 degree reflector. Detection specs are the same as a 9500ix.