OP, you may have one and not realize it, some of the newest watches have accident detection capability. The one I have knows my pulse, I am sure if I paid for the subscription service I would be able to set up a warning for pulse too high or too low. I have seen other units with lots more capability. Your cell phone can also act as a emergency location device, we have 911E in this area.
My point, I am not sure a separate device and service is required. An app and possibly a small device will give you the same capability.
__________________
Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
|