Request for help in identifying the radio controller-receiver

Somewhat by chance I came into possession of the two-channel radio controller shown in the photographs below.
The receiver is based on a PIC16F628 microcontroller and works with two remote controls on HCS301 (Keeloq).

The manufacturer has unfortunately not signed off, all I have is the symbol K210207 in the corner of the board.
Do any of you recall such equipment? Maybe the casing, maybe the board looks familiar? Or maybe (I know, it would be a miracle by now) someone also has any description of this hardware? I'm mainly concerned with the role of individual pins/jumpers.

The controller currently works, the remotes control the relays in bistable mode.
I would like to use this hardware but I need to switch it to monostable mode (short pulse after receiving a remote control command) and maybe teach it to work with more remotes on the same circuit (if possible).

The pins are connected directly to the processor, so I can't deduce anything from the board itself. And I don't want to damage the hardware in the dark either....

Anybody?

What device was this module sitting in?

In none. I found 2 of these in the electrical switchboard of the house I purchased. They controlled the driveway and garden lighting.

12V AC power supply, inside I can see the possibility of connecting a DC power supply.