Features of the Electronic Heating Pack 1. double-security: a double temperature controller is incorporated to realize double-security, so that users can assure during using. When temperature reaches about 60°C, it will automatically switch off. 2. The charging time needed is short. Only three to six minutes are sufficient for once charging. 3. Prolonged using time. Once charge can support hand warming for 3 hours and keep warming for 12 hours. 4. The product has been enveloped firming along the circumference so that it can maintain its appearance intact and will not be worn or broken even after being used for a long time. 5. The product is covered by property insurance of CPIC 6. Packing detail: 1pcs/color box, 12pcs/ctn 7. G.w/N.w: 13kgs, 12kgs