The directions for assembly did not come with the box.  Had to call the company.  They answered immediately and emailed the directions straightaway.  They remained on the line until I opened the email.  Pretty easy to assemble just make sure you have the back and front sections correct.  The directions show a lot of twisting arrows.  I ended up putting it on incorrectly.  Very hard to disassemble once locked into place.  I did manage to, but if someone was trying to do it on the street, the police would be there before they would ever get to the package.  I'm confident no one will be able to steal from the device