check / update firmware version of peripherial?

[Yarden92]

On the Aqara Wireless switch button at 2016 dual button switch you wrote:
if using firmware version 24.* or older....
if using firmware version 25.* or newer...

I'm using that device, but how can I tell what's my firmware version?
and is there a way to update it if its old?

I own Xiaomi gateway as well if needed (tried from it but couldn't find any mention of firmware for the switch)