I would give two individuals either Phonaks Invisity, or Roger earpieces. They are tiny and fit in the ear (so no extra pack), and can be painted with makeup to blend in. The Invisity works with a 216 transmitter (Comtek or Listen Tech) and the Roger will need a Roger base station. I don't think speakers will work, you'll just end up with bleed. Hope this helps! https://www.phonak-communications.com/en/products/ear-prompter/ https://www.roger-studio.com/