The box had everything to install the radio. Radio, Wiring harness, speakers, antenna, and all the hardware necessary.
The instructions are many pages and are basically just pictures or drawings. It assumes you know how to remove the tupperware. Many of them with the disclaimer "parts removed for clarity". Very few words to explain how to run the wires or even where the radio mounts. I thought is would mount in the center under the seat. It mounts on the right side under the tupperware. The antenna cable is longer than necessary. You coil it up and zip tie it to the left side.
Speakers were easy. The wires were already in the Trike.
Installing the DIN plug into the Frunk was the hardest part. I believe the instructions assumed the Frunk had been removed. I did it with the Frunk still on the Trike. There is a circular "nut" that hold the pin to the Frunk. There is a waterproof hinged cover that goes between plug and the nut. So you snake the DIN plug in from the back where you cannot get a hand to hold it, pass the tip of it through the hole in the Frunk, put the hinged cover over the tip of the DIN plug and then try to screw the circular nut over the tiny bit of thread you can reach. The hinged cover gets in the way.
I think it would be easier to put the nut in the cover and close the cover. It might trap the nut enough to allow you to turn the entire cover to start the nut.
I held the cover open with a small piece of a zip tie pushed into the hinge. Once the threads started it was simple to finish.
The DIN cable for the IPOD was in a separate envelope and did NOT come with the kit.