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To ensure 100% customer saftisfaction, 91sensors offers customer friendly service.
For any product defect or quality problem, 91sensors would like customers to return the product and make 100% refund. Please think carefully and contact 91sensors before making decision of return.
For bulk order and custom order, 91sensors will send cusomer samples before bulk production to confirm every detail of the order ,including the sensors,softwares, packing detail,shipping information and etc.