Everything was starting well, the laser unit has run for a few days and then nothing. Having am appealing to a competent friend to install the block, I had to wait my commancde special screwdriver to remove me even to operate the warranty. And I learned that the optical block n are guaranteed one month and no one can do anything for me. A little disappointed (especially kids) to have a console that does not work, and even more disappointed to see the policy of exchange of Amazon which is totally unacceptable and illegal
