The Nissei RS-50 SWR power meter is a versatile tool designed for amateur radio operators. It covers VHF frequencies from 140-150 MHz and UHF frequencies from 430-450 MHz. One of its standout features is the ability to measure forward power, reverse power, and SWR ratio with a single button push. The device is equipped with an LED-backlit display, ensuring that readings are easily visible even in low-light conditions, which is crucial for accurate monitoring during operation.

Powered by internal "AAA" batteries or an external Micro USB port, the Nissei RS-50 offers flexibility in power sources. It can accommodate rechargeable batteries, although it does not include built-in charging circuitry. The unit is designed with a convenient control layout for straightforward operation, allowing users to quickly switch between measurement modes and access essential functions such as forward/reverse power and SWR readings. The device supports a power range of 0-120W with a ±5% accuracy, making it reliable for various applications.

Measuring just 70mm in width, 78mm in height, and 30mm in depth and weighing 220g without batteries, the Nissei RS-50 is compact and portable. The SO239 M-type connector ensures compatibility with standard transceiver setups. For optimal performance, users are advised to install two "AAA" batteries, ensuring correct polarity and removing them if the unit will not be used for an extended period. The package includes the Nissei RS-50 Digital SWR/Watt Meter and a user manual, providing all necessary information for practical use.