Ruth Ann Crystal, MD on X: "Casio TM-100 from Nerd Watch https://t.co/uHEA2nTfrM. It can transmit sound. (One way walkie talkie-esq?) @mhattikudur @mwichary @ruffian https://t.co/YdKkpzvtPX" / X
Casio TM100 - demo - YouTube
Casio TM-100 Transmitter Watch | Vintage Electronics Have Soul – The Pocket Calculator Show Website
Casio TM-100 Transmitter watch review - Ep 47 - Vintage Digital Watches - YouTube
Casio TM-100 FM Transmitter Watch : r/cassettefuturism