The voice search uses your browser's built-in SpeechRecognition API. Simply click the microphone icon (🎤) in the search bar or use the floating mic button, speak your product query naturally (e.g., "red running shoes under $50"), and the plugin will process your request. If you have an OpenAI API key configured, it will use AI to understand context and show relevant products in a modal. Without an API key, it will redirect to standard WooCommerce search results.