The RS-50MAX is an advanced measuring and testing instrument designed for use in frequencies from 140 to 170 MHz and 430 to 470 MHz, with center calibration at 145 and 435 MHz. It supports a power range from 0 to 120 W, making it ideal for amateur radio and professional applications. It provides accurate measurements of forward (FWD), reflected (REF), and standing wave ratio (VSWR), as well as measurement capabilities in CW, FM, FDMA, DMR, SSB, and AM modes.