BTB Electric is not only a manufacture and supplier, but also offer unique ideas and optimal solutions for each Project, Ensure customer satisfaction and trust.In order to evaluate product quality, it is not only based on the external design, but also consider other important factors such as durability, stability, performance... BTB Electric's products are certified by Underwriters Laboratory (UL) of the US, Intertek of the UK, Kema of the Netherlands...Pls see link below:https://apnews.com/press-release/marketers-media/turkey-europe-middle-east-western-europe-asia-42ada1a4ba3dbd8ceb08ce9e359a456b