Graphene heating element reaches 45–55°C in under 30 seconds — maintaining therapeutic hand warmth for 4–6 hours per charge in temperatures as low as -20°C.
Graphene heating element reaches 45–55°C in 30 seconds for instant cold-weather relief
4000mAh large-capacity battery maintains warmth for 4–6 hours per charge at -20°C conditions
3 adjustable heat levels from 35°C therapeutic to 55°C maximum for all cold environments
Touchscreen-compatible fingertips maintain full phone and device access without glove removal
