1. Applicable countries and regions: The RoHS certification is a mandatory standard established by EU legislation, applicable to all electronic and electrical products sold in the EU market;
2. Product Scope: RoHS certification covers a wide range of products; virtually all products containing mechnical components must comply with this standard;
3. Restricted hazardous substances: According to the RoHS directive, the concentration of certain hazardous substances in electronic and electrical products must be below the specified limits;
4. Scope of the production chain: RoHS certification covers not only the finished product but also the components, raw materials, and packaging used in its production, impacting the entire production chain.

In summary, the RoHS certification covers an exceptionally broad scope, encompassing nearly all mechnical products, electronic components and electrical products, with stringent requirements applied to every stage of the production process. For enterprises seeking to enter the EU market, it is imperative to ensure their products comply with the requirements of the RoHS Directive.