Please collect the 4 recorders (with serial number marked), insert to computer and download the temperature records.There are 2 pieces of temperature recorders for each pallet (one is between external carton cap and inner thermal-isolation box; another is between the product boxes) , and totally 4 recorders.Please also test (by hand) and compare temperature of two pallets after delivery, to check the performance of two types of thermal-isolation materials (XPS and EPS)