You can travel back in time to the year you were born and bring with you 5 examples of modern technology available in 2016 to show to scientists and tech nerds of the past.
What do you bring? If you can't physically carry something you want to show them you can try showing them pictures, videos or whatever.
Books are not technologies, so a fucking truckload of books about computers, clean energy, pollution and how we fucked everything up.
Vibrator, self heating fleshlight, one of those silicone egg tube cooker things, and a pair of google glass.