Key benefits Durable black protective case provides reliable shielding against external damage, helping the antenna analyzer withstand field use and rough handling. Simple, intuitive operation with easytouse buttons; quickly select operation mode and access extended functions without complex setup. Wide SWR measurement range from 1.0 to 9.99 with configurable frequency step sizes of 100 Hz, 1 kHz, 10 kHz, and 100 kHz, enabling precise tuning across bands. Compact, portable design for onthego use; lightweight and easy to store in a bag. Powered externally from a DC supply of 12 to 14 V at 500 mA, using a 2.1 mm centerpositive connector; connect and start working promptly. Key specifications and features SWR measurement range: 1.0 to 9.99 Frequency step size: 100 Hz, 1 kHz, 10 kHz, and 100 kHz Power supply: external DC 12–14 V, 500 mA Power connector: 2.1 mm centerpositive Construction: black protective case for durability and portability Portability: compact size for easy carrying and storage What makes it stand out Robust, protective casing combined with straightforward controls delivers reliable field performance without complicated setup. Flexible measurement resolution lets users tailor the precision to specific antenna tuning tasks. The external power requirement and compact form factor make it convenient for portable use in field work or small workspaces. Use scenarios Field antenna tuning: take the analyzer on outdoor trips or field days to quickly assess SWR on portable or temporary antennas and make precise adjustments. Home workshop optimization: use the wide SWR range and adjustable step sizes to tune dipoles, verticals, or other wire antennas across multiple bands for peak performance. Installation and maintenance: verify SWR and check cable or connector integrity during installations or after changes to feeders, ensuring reliable operation of radio systems.