ix551

Hello man, I received one SDLaser 303 today.
But it don't work, only one time it turn on for 1 millisecond.
I put the battery reversed, this is no problem right?

I have two questions, one is if you could find the defect or fix your laser.
The other is how do I open the front of it?

Thanks.

Igualmente, soy de Guanajuato Gto, donde se hace el mero "cerventino" jaja