The product is a vintage RadioShack Micronta Model 21-525B Field Strength SWR Tester that comes in its original box. This wattmeter is designed for radio communication purposes, specifically for measuring field strength and SWR (Standing Wave Ratio). It is compatible with universal brands and is likely a sought-after item for collectors or radio enthusiasts due to its age and brand. The Micronta brand is well-known for producing reliable electronic devices, making this tester a valuable addition to any collection of radio communication parts and accessories.