How to Check Your Wi-Fi Signal Strength - How-To Geek
https://www.howtogeek.com/426642/how-to-check-your-wi-fi-signal-strength/
WEBJan 18, 2022 · The first thing to know is measurements of dBm will display in negative numbers. The scale runs from -30 to -90. If you see -30, you have a "perfect connection," and likely, are standing next to the Wi-Fi router. However, if you spot a Wi-Fi signal listed at -90, the service is so weak you probably can't connect to that network.
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