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I found this on the ground and it works, I just want to know what it is for.
On the breadboard this is what is printed on the back next to the battery holder:
Pictures below.
That is a key fob transmitter.
It transmits on 422 Mhz (box with 422NDR is basically the transmit crystal).
The IC generates the unique code for its receiver to decode and take action on, so not just any remote will activate a device, for security. The IC is likely a PIC or similar microcontroller. The holes along the side are to program the chip, and to test it.
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