Warranty is valid on some products, exclusively If it has been mentioned. Generally Semiconductors doesn’t carry any warranty what so ever. Some of the materials, kits, boards and circuits carry warranty and are bound by terms & conditions of warranty and type of usage. In case of damage under transportation we are not liable for any return or replacement. For the items which are resell by us would carry the warranty of its respective manufacturer, if offered by them. Also see warranty terms and conditions. No return will be accepted once the order is shipped. There will be no refund for any item under any circumstances.