特别说明：请客户在购买凯悦牌产品时向厂商或经销商索取带有效红章的质量保证书或发票，请认准产品的上防伪合格证做及时的电话查询来保证您所购产品为正牌产品。special note: please customers to buy the hyatt brand products obtained from the manufacturer or distributor with an effective assurance of red chapter books or invoices, please and passed anti-counterfeiting of products to do a timely manner on the telephone inquiry to ensure that your products are genuine products purchased .