Thanks, but your reply was unrelated to what you were replying to.
Now that you've changed the subject, are those also available without speakers? Speakers are electrically just inverse microphones and can be used that way.
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Discussion
nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqwamvxt2tr50ghu4fdw47ksadnt0p277nv0vfhplmv0n0z3243zyqkmdjma nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqaxvx5yx242t88r8d4z92h5lpssc8heg58e58g46cr7dsjmrwlzwq2j3cye nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqr0ulywwu593kzjdu9uluxdq80t54n65kql9vl9z7lrutkgnachss2lnpq0 nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq0npj3gydmv40m70ehemmal6vsdyfl7tewgvz043g54p0x23y0s8q7r6usq nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq2rrvutnfeu9677d4yjytypqccjn0njnm6zkx2j6xyn2uqfw02ldsl7kgqj nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq294d6xdgvx30g2wvezpluueyx9ua22vzfryz04504l5z9e5hcq2qw6c3cg No, not all speakers are usable as microphones. It depends on how they connected to the device.
Thanks Sherlock, obviously a buzzer style speaker would be hard to use as a microphone.
I prefer the simplicity of a device not even purporting to have speakers at all. Perhaps that's because I'm, as you say, "not technical"