Garage Remote, Frequency.

I know are some on here far more clever than me, so I wonder if anyone can help.

I want to install a remote for my garage doors on my Multistrada, and want to go simple with it not involving my phone etc which I don't even have turned on a lot of the time..
Our drive is very steep, with my other bikes I can stop on the slope, hold the bike back with my feet whilst I remove a glove and fish around in my pocket for a remote.
The Enduro is too heavy to do this and I'm going to go over on it if I keep trying.

I'm going to buy a spare remote, remove the PCB, solder wires to the 'open' tack switch and run the cable to a waterproof handlebar switch.

The spec says the 2yr old Ellard units are 433Mhz, which makes sense with current trends etc.



Now I don't know a great deal about these things, but I do know you need an Oscillator crystal on the remote and receiver to set the frequency of the signal.
My limited understanding from mucking about with communications stuff in the past tells me the Crystals won't have exactly the same value, but will be around the frequency in the spec.

Opening up my remote and receiver I was a little surprised to find Oscillator crystals at @26/27Mhz, which is the frequency used for remote control cars etc and worries me with regard to security.

Receiver:


Remote:


Have I got this wrong?
Have I been sold old units running on 26Mhz and given a data sheet for newer ones?
Can the units be transmitting at 433Mhz using 26Mhz Oscillators? I doubt it.

I obviously can't get hold of the supplier or a spare remote to try until Tuesday.

Thanks

 

Thanks all.

I'm better armed now to look into this in more detail.

 

Thanks Chris.
I don't want to involve my phone in this and am happy to press a button as I come down the road.
Simple suits me I'm afraid.