1.Two years warranty, free accessories.If there are quality problems,provide pictures or video, engineers judge the problem and provide after-sale support Products with CE ROHS certification. 2.We are 10 years manufature about professional audio speaker and power amplifier,4 years gold supplier on Alibaba. 3.Our engineers have 10 years work experience, very professional. 4.The product is light and suitable for performance and conferences. 5.There is no minimum order quantity limit ,you can choose to order 1pc or 1000000pcs.No limit about quality. 6.Products with CE ROHS certification.