E-yooso Z686 BT Wireless Mechanical Keyboard Gaming Product DescriptionQuality control The damage rate of our products is between 1/1000 and 3/1000. Before leaving the factory, we have strict product quality control tests. If the products fail to meet our requirements, we will require rework.Warranty All our electronic products are guaranteed for 1 year, some even 5 years and 10 years (such as power supply). If the product is damaged within 1 year, we will compensate. This will find the most suitable solution according to the actual situation of the customer, and we will not let the customer bear the loss.Certification At present, we sell redragon and E-YOOSO products. All redragon and E-YOOSO products have passed CE and FCC certificates. Customers can buy with confidence and the products can enter your customs smoothly. All our products are made of eco-friendly materials and will not have a strong plastic smell.Double injection keycap The keycap characters of the double injection keycap are light-transmitting. If the product is rgb or single color, the same color will also be displayed on the keycap. The characters of the double injection molded keycaps will not disappear, even if the keyboard is used for 100 years, his characters will not disappear.