I needed to chip 2 of my dogs and the kit came with everything to get it done as simply and painlessly as possible! Minus the alcohol pads and such to clean the area before the injection...If you're doing more than one I would strongly suggest opening one at a time and only once you are ready to implant the chips to 1) keep as sterile as possible. 2) not mix up the tags and the chip syringes. But they do come together in the same sealed package that you can clearly see which is to which and they do also have barcode type stickers that you can label the syringes or packages with if you would prefer to keep them straight.The needle is so small though, and I thought I might need my husband to help me get it done with them, but I honestly believe because I found the smallest I could get on the market it made it so much easier to do even by myself.When I registered their chips on the site it didn't cost anything additional to do it and it was super simple and you can out some pretty detailed info on there for whoever finds your pup!Tested out the QR code on the tags for them after registration and it comes up no problem!Then finally, I checked about a month after the implantation with a chip scanner and one migrated (which is normal) but is still there in him! The other came up no problem!