I believe I have another argument which speaks for the higher range of 510. If I use the transmit power values on the datasheet instead of the product page, then I get: Maybe the power transmit...

I found a datasheet with more details available on this site: https://www.tp-link.com/us/support/download/cpe510/...

@Vincent-TP thanks for your fast answer 🙂 * **Beamwidth and Antenna Pattern:** The CPE510, being designed for longer distances, has a narrower beamwidth (Beam Width: 45° (H-Plane) / 45° (E-Plane))...

from https://www.tp-link.com/us/business-networking/pharos-cpe/cpe210/ . When I calculate the receive power (transmit_power + antenna_gain - path_loss + antenna_gain) for 5 km for CPE510 and CPE210...