• [Smart Heating] Equipped with intelligent temperature control for personalized warmth management
• [Durable and Safe] Features a rechargeable battery with multiple safety layers to prevent over-voltage, overcharge, overcurrent, and short circuits
• [Extra Power Bank Function] Not only a hand warmer, but it also serves as a portable power bank for iPhone and Android devices, making it perfect for travel
• [Thoughtful Gift Idea] A warm and cozy gift for Christmas, birthdays, or any occasion, ideal for Raynaud's sufferers or outdoor enthusiasts
• [Unique Charcoal Fire Design] Features a distinctive charcoal fire design for a stylish and functional look

Specifications:

• Input: 5V 2A Max
• Product material: ABS+aluminum alloy
• Working time: 2.5-12.5h (depending on different gears/usage scenarios)
• Battery: lithium-ion battery
• Charging time: 5±1h