I just bought a 2014 crewcab xlt I left the lot with 2 keys with attached fobs and a little square fob with one button on it and a picture of an uncut key on it. For the life of me I can not figure out what its for ive pressed it and checked everything I can think of does anyone have any Idea what this is? Its about to run me crazy trying to figure out.

remote start fob, i think?

My 2013 FX4 has the key/fob combo, and MrsGomers Explorer XLT has the same kind, like the one pictured below...I guess I just assumed they were all like that, but maybe not? Never seen one like the one you posted.

The lincoln mkx my wife inherited has that fob. We've never researched how to make it work.

i have 2 of what you pictured but also have the smaller thing I posted that is about to run me crazy if i cant figure out why i have it

i may try that i guess lock doors with other fob then press this one?

That is exactly what it is thank you i have to press the lock on other fob twice until horn beeps then hold the other one down and it cranks up man im glad to have figured that out I was about to start drinking over it kicking my ass like that lol

According to Google, it's a remote start fob for cars that didn't have it built into the keyfob....

https://accessories.ford.com/1-way-plugnplay-remote-start-kit-for-mykey-equipped-vehicles.html