The key piece of TuneLink Auto is a surprisingly unassuming black plastic bulb designed to work solely in a car’s cigarette lighter power ports. Plug it in and a blue light around its front surface will illuminate, ringing an auxiliary audio out port and a USB connector, neither of which actually needs to be filled with anything. When it’s used in fully wireless mode, TuneLink Auto can take music that’s being streamed over Bluetooth…
