Where can I find a device for loud notification of an incoming call in the country?

Question

Do it yourself

When my relatives are in the country, they very often do not hear the sound of an incoming call, because the phone is in the country. I thought that there are probably some bluetooth devices (for example, a battery-powered speaker) that can duplicate the sound of an incoming call.
As I understand it, it will not work to put a regular bluetooth speaker, because the voice of the caller will also be duplicated there, but I need to talk on the phone, I need to send only the sound of the incoming call to the speaker. Switching the sound each time from the speaker to the phone is unlikely to be mastered by relatives.
Android phone + iPhone.
Surely there are some solutions to this issue?

Answer 1

In many speakers, along with charging, there is a cord - a minijack, for non-Bluetooth operation. They came up, otdyknuli, and they say, they turned it back on, and again like a "mouthpiece"

Answer 2

If at the dacha RELATIVE - then the phone is clearly not alone.
Allocate some kind of soundproof radio-transparent place for phones - a cooler bag, a box under the pillow, etc. There's a microphone, plug the microphone into the speaker. The phone rang - the column amplified.
Something similar can be done with a baby monitor.

Answer 3

If you have hands, unnecessary but working speakers and a lot of old headphones, you can try a 3.5mm mini-jack in the device, we expose the wires of the headphones, connect them to the speaker and, in theory, it should work (should but not have to).
And during the conversation, as Voll said, the 3.5mm minijack was pulled out, talked back, connected.