48h High Temperature Test 2-8 °C Conclusion:Under the ambient temperature of 36℃, this package can maintain its inner temperautre in the scope of 2~8℃ for more than 50 hours. 48h Low Temperature Test 2-8 °C Conclusion:Under the ambient temperature of minus 20℃, this package can maintain its inner temperautre in the scope of 2~8℃ for more than 70 hours. 72h High Temperature Test 2-8 °C Conclusion:Under the ambient temperature of 35℃, this package can maintain its inner temperautre in the scope of 2~8℃ for more than 77 hours. 72h Low Temperature Test 2-8 °C Conclusion:Under the ambient temperature of minus 20℃, this package can maintain its inner temperautre in the scope of 2~8℃ for more than 97 hours. 48h High Temperature Test 2-8 °C Conclusion:Under the ambient high temperature,this package can maintain its inner temperautre in the scope of 2~8℃ for more than 48 hours.