Pac2 earthquake alarm

Buy offer Details

Hi Supplier,I am a buyer from Lucky Project Enterprise located in Philippines. I am interested in adding your on stock earthquake alarm, detector device to my inventory.May I know more information about product. how the alarm is triggered like what must be the intensity before it automatically turns on the alarm. What is the product-per-unit cost including shipping via Air Express to the Philippines(fob manila)?if I may also ask why in TradeWheel theres 3-5 of same product but with huge price difference??? how will I know which one to buy??? what are the differences?. Thanks & RegardsJenniferLucky Project Enterprise