THIS IS A BRANDNEW 2 SENSOR
Repairing: The item will have one full year warranty from us starting from the day you got our parcel.In most cases when item got problems we shall send you necessary parts with free cost for your own replacement so you needn't return the machine to us for repairing. And we shall provide online technical guide for you to replace the parts. Exchange:All items from us will be entitled to a 1to1 exchange if you find the item is faulty within 14 days when item is signed.Please note returning item must IN ORIGINAL SHAPE, that means this warranty DOES NOT COVER damage caused by mishandling, abusing, alteration, neglect, disassembly or dropping. After checking we shall send you a new set. Return:Due to the personal nature of this unit no refunds are offered only exchanges.