If you don't know what to do with those electronic modules, please don't buy. Those are sold as-is for the prop hobyists/enthusiasts with no refund once you've soldered anything to them: if you don't know what you're doing, we can't be held responsible for them not working anymore. However, we will offer assistance as much as possible.
Buyer pays material & shipping charges - product is inspected and tested prior to shipping. If anything is to happen in transit, please contact the parcel services. We cannot be held responsible for the parcel services.
If you did soldering on the board and it is now toasted... sorry about it, but you fried it. We cannot be held responsible for your usage of our modules.
If you are not happy with those terms and conditions, please do not purchase from us. thanks and have a nice day.