One year warranty and lifetime maintenance. If any quality problem/fault in material/design under correct operation within one year, if easy to fix, we will send new components Freely and guide you on how to repair them. If hard or complicated to fix, we will send a new chamber or machine to you directly and Freely. In this way, we won't need you to send back the machines, just video and pictures will be ok for our analysis. (shipping cost not covered.)