Fbee Go Flow Rechargeable Hand Warmers 2 Pack, Enhanced SafeWarm Technology 3s Fast Heating, Smart NTC Temperature Control, 3 Heat Levels, Up to 7H Runtime, 16mm Ultra Slim Card-style, Carabiner Ring

3S FAST HEATING & 3 HEAT LEVELS: Enjoy warmth in just 2 seconds with 3 adjustable temperature settings: Level 1 (38–42°C) for up to 7 hours, Level 2 (43–47°C) for up to 5 hours, and Level 3 (48–52°C) for up to 3.5 hours. Ideal for commuting, outdoor activities, skiing and winter adventures SAFEWARM 3-LAYER SAFETY PROTECTION: Powered by SafeWarm Technology, this rechargeable hand warmer features intelligent chip protection, smart NTC temperature monitoring and timed heat reduction to automatically manage heat output for safer warmth ULTRA-SLIM & LIGHTWEIGHT POCKET DESIGN: Measuring only 16mm thin and weighing just 62g, this card-style pocket hand warmer slips easily into pockets, gloves and handbags without adding bulk. Recharge via USB-C for convenient everyday warmth wherever you go BUILT-IN CARABINER RING FOR EASY CARRY: The integrated carabiner ring allows easy attachment to backpacks, handbags or key rings, keeping your hand warmer close and easy to access. Perfect for walking, travelling, camping and outdoor activities PERFECT WINTER GIFT FOR EVERYONE: With a stylish design and gift-ready package, this rechargeable hand warmer 2 pack is a thoughtful Christmas gift, birthday gift or winter gift for family, friends, couples and colleagues