Check the listing for details. Vintage Hy-Gain Model 421B Power/SWR Meter. Condition: Used. Listed at 89.00 USD. Very nice and clean vintage Hy-Gain Model 421B Power/SWR Meter. Connectors are clean and bright. From my shack. Non Smoking.Power Settings 2KW 200W 20W SWR Settings STBY FWD SWR A must-have for any radio communication enthusiast. It is a high-quality, reliable tool that allows you to measure the power and SWR of your radio transmission. The meter is compatible with a wide range of brands and is designed to provide accurate readings. With its sturdy construction and easy-to-read display, this meter is perfect for both novice and experienced users. It is an essential piece of equipment for anyone who wants to ensure that their radio transmission is at its best. So, whether you're a professional or a hobbyist, this vintage Hy-Gain Model 421B Power/SWR Meter is a great addition to your collection.