If you want to know about reception range, my experience is that using this Bluetooth transmitter [
https://smile.amazon.com/gp/product/B01B4W40VC/ ] connected to my TV, I've listened ~30-ft away (no intervening walls), and ~15-ft away (with one or two intervening walls), to audio being played through my N3. At these distances, if my body is between the transmitter and the N3, there begins to be some signal interference.
I've now purchased a much more powerful Bluetooth transmitter [
https://smile.amazon.com/gp/product/B01N7U2G17/ ], but haven't hooked it up yet.
I haven't done any research on the transmission range of the the N3.
The disappointing thing, is that all of my budget DAPs with Bluetooth & aptX (Cayin N3, Shanling M2s, Shanling M1), only support aptX in their transmission mode, not in their reception mode (which is SBC only).