Laser dot always on?

I’ve a new Laser , Atezr V35.
I’d manged that the Laser dot is on if pressing Fire, but, very fast, after some seconds the dot is off. Not enough time to run to my laser outside and check.
Before, last month, at my second laser a neje 3 max the Dot was always on, no need to press Fire.
Is it possible to switch the Laser Dot always on or enlarge the time it is on?

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