Thank you AgX and Bill,

There is least 4 weeks to camera reach me. It was so cheap , I am expecting an malfunction but may be I am wrong , I wish I was. My neighbor is at holiday and there is one week to return. Your tips are priceless , please forgive my ignorance but is there a digital processor in these cameras ? IC or something like that to be needed to programmed ? Or everything is analog ? What about the transistors , are they galium or modern silicon ?

Thank you very much for your time,