![Surecom Sw-114 Swr/rf/field Strength Test Power Meter For Relative Power 3 Function Analog With Field Strength Antenna - Walkie Talkie Parts & Accessories - AliExpress Surecom Sw-114 Swr/rf/field Strength Test Power Meter For Relative Power 3 Function Analog With Field Strength Antenna - Walkie Talkie Parts & Accessories - AliExpress](https://ae01.alicdn.com/kf/H5b404284c6344c06b0101e95ccfa9291r.jpg)
Surecom Sw-114 Swr/rf/field Strength Test Power Meter For Relative Power 3 Function Analog With Field Strength Antenna - Walkie Talkie Parts & Accessories - AliExpress
![Nanovna-f Vna Swr Meter Vhf Uhf Antenna Analyzer 1.5ghz + 4.3 Ips Lcd + Metal Case Deepelec - Walkie Talkie - AliExpress Nanovna-f Vna Swr Meter Vhf Uhf Antenna Analyzer 1.5ghz + 4.3 Ips Lcd + Metal Case Deepelec - Walkie Talkie - AliExpress](https://ae01.alicdn.com/kf/H14ece1a2c0584c5dab184f77404b6b99G/NanoVNA-F-VNA-SWR-Meter-VHF-UHF-Antenna-Analyzer-1-5GHz-4-3-IPS-LCD-Metal.png)
Nanovna-f Vna Swr Meter Vhf Uhf Antenna Analyzer 1.5ghz + 4.3 Ips Lcd + Metal Case Deepelec - Walkie Talkie - AliExpress
![Would anybody know what the knob in the middle of this meter does? I was given one like this by a friend but not sure how to operate it. Thanks for the Would anybody know what the knob in the middle of this meter does? I was given one like this by a friend but not sure how to operate it. Thanks for the](https://preview.redd.it/vwoce0zx5ya41.jpg?auto=webp&s=302ad59d2b75d9fa7c025a910c128d6ae7f80ac8)