... 2 years 1).If driver failed, we'll send you a new driver; 2).If LED failed, we'll send ... LED; 3).Unclear reason, we will send you a new full set. All freight at our side;Professional ... efficiency test etc..2). Assembling:Following schedule for quality and lead time. Every order's progress is shown to all ... month7).All managed by software2.Payment Term O/A,L/C,D/A,D/P,T/T,Western Union,Paypal etc ...