I narrowed it down to the final two racks. The text is ~5pt. This is the one that works:stays on, clear mic (I needed to tweet zoom audio settings: volume, background noise suppression), always able to hear student comments without something in my ear. These are definitely not them, you get what you pay for. It delivers good quality sound in a small package. Espero el cambio, o la devolución del dinero. Adhesive does not stick to wood or painted wall. Im so sad they did not work for me because they are so pretty and well made. They do sound very good, have a huge soundstage (wide sound) and very neutral. Bought them just before Covid-19 for a 5000 mile round-trip across the USA.