They are D.A.R.K.s (Direct Action Response Kit) by Dark Angel Medical.
Got one for me and one for the wife.
http://darkangelmedical.com/d-a-r-k-trauma-kit/
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Definitely wasn't the winner, but it was fun, and better practice than just sitting on the couch.
Well, I'm 68 - been lifting forever. I'm currently abstaining from squats ( my favorite exercise) because my left knee is telling me to. I'm planning to get Synvisc injected (works, done it countless times). Had the right knee replaced 7 years ago, along with both shoulders, back surgery, carpals, etc. Good luck - keep your head up.