The Vintage Royce Electronics Model 2-100 Field Strength & SWR Meter is a classic device designed for measuring the strength of radio signals and SWR (Standing Wave Ratio) in the CB and ham radio frequencies. Made by Royce Electronics Corporation, this meter is compatible with Royce brand equipment and is a valuable tool for ham radio enthusiasts looking to optimize their signal strength and ensure proper SWR levels for optimal performance. With its vintage appeal and functionality, this meter is a must-have for any ham radio operator looking to enhance their communication capabilities.