That's what makes the tiny new Ysmart Bullet2 a great choice out in the wilderness: it's small enough to fit on a keychain or belt loop, and it turns on as soon as you yank it from its magnetic base.

Peter Gratton, M.A.P.P., Ph.D., is a New Orleans-based editor and professor with over 20 years of experience in investing, risk management, and public policy. Peter began covering markets at ...