Graphene hand warming bag, high-grade flannel, graphene heating sheet, no liquid, no battery, can be used on airplane

1. Material: high-grade flannel fabric + custom insulation material + graphene heating sheet.
2. Sizes: 195 * 110 * 18mm. Weight: 45g.
3. Input: 5V / 2A.
4. Maximum surface temperature: 60-70°C.
5. The heating time varies due to the environment (requires the power bank):
10000mAh mobile power bank fully charged – about 6 hours of heating.
20,000mAh mobile power bank fully charged-about 12 hours of heating.
Note: the product does not include mobile power bank.
6. Use: indoor and outdoor, no liquid, no battery, can be used on airplane.