I found this little jewel today. It is a Sony SRF-220 AM/FM Stereo radio weighing 1.6oz/44g with the battery and earbuds.
Features:
- It is the size of a credit card and 5mm thick.
- 1.6oz/44g with battery and earbuds
- Runs on a single CR2032 coin cell battery: 20 hours on FM and 30 hours on AM.
- Comes with MDR-E808 earbuds (2.5mm plug) with foam covers
- Analog tuning
- On/off switch, AM/FM selector, tuning and volume dials
Basic impressions:
Reception is acceptable in town with some background hiss. I’m curious to see what the reception is like in remote areas. The tuning dial needs careful manipulation to get best reception. The battery tray has a clever push button release. Like many vintage Sony electronics they have become a collector’s item, so don’t expect to get one cheap online. If you want light and compact, this is as good as I have seen.
The radio comes with several different graphics. This is the Sumo Wrestler version.

The tuning dial is tiny and good for very general reference only.

Left to right: tuning dial, AM/FM selector, volume dial

Right end: battery tray eject button, power switch, earbud jack

Battery tray with CR2032 cell

The same outer perimeter as a common credit card and 5mm thick.


