Main function: The standard firmware measures antenna performance, enabling practical vector network measurements. Display and features: With a 2.8 inch LCD display, this product provides vector network measurement functions for precise testing and analysis. Size and usability: Small and portable, offering flexible and convenient operation in various work environments. Interference and accuracy: Designed to minimize electromagnetic interference and to ensure measurement accuracy. Compatibility and workflow: Built to integrate with common RF test setups and vector network measurement workflows for straightforward use in hobbyist and DIY projects. Performance highlights: Delivers reliable, repeatable measurements for antenna characterization and related RF testing. Use scenarios: Tuning and validating a homemade antenna on a bench setup. Testing RF modules and connectors within a DIY project. Field measurement of antenna performance during installation or deployment.