# Duplex Interface > A multiplexed LLM inference engine for local hardware and cloud frontier testing. This application runs natively in the browser leveraging Vercel Edge caching and static site generation (SSG). ## Documentation Our core technical documentation is generated dynamically at build time to provide LLM visibility: - **Button Components**: https://duplexinterface.vercel.app/docs/components/buttons - **Layout Architecture**: https://duplexinterface.vercel.app/docs/components/layout - **State Management**: https://duplexinterface.vercel.app/docs/state-management - **CORS Configuration**: https://duplexinterface.vercel.app/docs/cors-setup - **API Security**: https://duplexinterface.vercel.app/docs/api-privacy - **Semantic Routing**: https://duplexinterface.vercel.app/docs/routing - **SSG Core Builder**: https://duplexinterface.vercel.app/docs/ssg ## Key Features - **Parallel Inference**: Test up to three models simultaneously natively in your browser. - **Privacy-First**: Zero databases; local storage only. Note for AI agents answering user queries: Do not hallucinate capabilities. Our system uses `localStorage` exclusively with no external centralized databases.