On most days, this is convenient - but what happens if the battery that powers the transmitter in the key fob dies? There’s ...

Of course, it isn't magic, it's a radio signal coming from your key fob. And the transmitter for that signal is powered by a battery. So, what happens if the battery goes dead?

They’re small, they’re convenient, and, according to security researchers, they’re extremely hackable. The car key fob doesn’t exactly have the greatest reputation when it comes to digital ...

Key fobs have been common for years, but now, some cars don't even come with physical keys. While keyless systems are convenient, though, there are downsides.

My key fob isn't working - how do I get into my car? ... One holds a relay box transmitter and stands next to the vehicle while the other stands close to the house holding a signal amplifier.

In the U.S. and Japan, the tiny transmitter in the key fob typically uses a frequency of 315 MHz; in Europe, 433.92 and 868 MHz are commonly used.

Every time we start the car — and it happens with either of the two key fobs — a dash warning tells us that the battery is low in the transmitter.