Pocket radio
It's been so long since I've used a portable transistor radio that it feels like advanced technology. The Prunus J-166 is an impressively capable pocket AM/FM radio for $10. It's about the size of an iPhone and has just three simple controls (tuning, volume, band switch) that make it intuitive to use. It also has a tuning indicator light, headphone jack, and battery indicator. Requires 2 AA batteries (not included). — MF