3km is maximum maximorum in clear city obstacles for ordinary Lora(TM) complect. If apply the directional antenna and increased power, them more. The good in Lora is price and never loss any bit of data.
Yet must warn, yesterday came known, the money may transfer the Wuhan virus, thus I deduce the postal parcels as well. Just provide a maximum sanitation measures before and after receiving a bought transmitter. Dont lick it