Review on Tenq RS40 Pro Dual Band Standing-Wave Meter & Power Meter - Ultimate SWR Testing and Power Measurement Tool by Jason Vigil

I returned this item because it was too small to read the scale without good lighting. If I saw it in a store, I wouldn't even buy it for that reason. So true? It's hard to say without laboratory equipment. But as with all radio systems, there are many variables that affect meter readings, so meter readings may not match advertised radio performance. This does not mean that the counter is wrong. Antenna mismatch is the main cause of this problem. If your eyes are better than mine, this might suit you. For my 60+ eyes I returned this and bought a larger digital display.