At the bottom of the page, there is a link/button for "read paper" which, if you keep scrolling, allows me to actually SEE the complete pdf without downloading it directly.
It might be browser specific(?)-- or maybe not at all on a mobile device, I don't know-- but you could try it with a computer browser.
The basic method involves getting the top of the carapace of the device open without spilling the epinephrine cartridge inside-- which is STILL spring-loaded with significant force, even after initial use. Nippers and a pocketknife seem to be the best tools, along with gloves or a towel to "catch" the spring and prevent it from pulling/propelling the epinephrine syringe mechanism out with it.
The internal syringe can, it appears, be actually used as is in the delivery of additional doses-- maybe 2 or 3. I thought that was the most useful part of the information, myself-- the use of the internal "collar" on that syringe device to automatically deliver the proper dose (again).
The main value of the pdf is all of the photos that go with the written explanations, which, to be honest, could have stood a LOT more peer review. I thought that the writing was not all that helpful.