VicTsing Bluetooth FM Transmitter, $13 with code BM2O8KL8

If you own an older vehicle, you probably don’t have Bluetooth. Hell, you might not even have an AUX jack. But that doesn’t mean you can’t stream music, podcasts, and phone calls wirelessly to your stereo.

Just plug this $13 transmitter into your car’s power outlet (it has a built-in USB port so you can still charge your phone), find an empty radio station, connect your phone over Bluetooth, and stream away.