FAQ Q1: May I ask for samples? A1: Absolutely. For most of standard fans, samples are free. Q2: How’s your warranty? A2: We provide 1 year of warranty, during which defective fans can be replaced at no cost. Q3: What product certification do you have? A3: Currently we only have CE certification. Q4: How about your lead time? A5: It depends. We have rapid delivery lines for some models, and the lead time can be as short as 5 days.