Gaozhenggao trading Co., Ltd. is a professional trading company for smart lock business, we have an energetic and innovative technical team with over 20 years of R&D and design experience, committed to providing customers with excellent solutions and excellent after-sales service. The company integrates research and development, production, and sales, committed to providing users with high-quality products and system solutions such as smart door locks, smart doorbells, and smart home core modules.