Credit: LuffuTL;DRFitbit co-founders James Park and Eric Friedman have launched a new wearable device called Luffu Link.It’s a $249.99 screenless health and safety band designed for family care.The LTE-connected band tracks health metrics, records voice notes, shares location, and can contact trusted people without a phone nearby.Fitbit co-founders James Park and Eric Friedman have launched a new wearable, but this time, it’s not focused on counting steps.