Probably a Flipper Zero. I saw someone do this with one recently. Even before that, I wanted one. It is a pocket sized software defined radio for sub-gigzhertz

Probably a Flipper Zero. I saw someone do this with one recently. Even before that, I wanted one. It is a pocket sized software defined radio for sub-gigzhertz signals. It can record and play back RF signals. https://flipperzero.one/ https://flipperzero.one/