I encourage you to try to write more and I do believe more mail you wrote more skill developed you will get from this. Below is the e-mail which I re-write and next time I suggest you to read first before you sent and the most important thing, I support you to read more English website or anything you preferred in English. I definitely believe that your English will be better if you try more.
We found that when we navigate from N13.71948 E100.51191 to N13.72050 E100.52539 then the unit with the custom poi installed will pronounce the alert of speed camera. But with 2467LM/2567LM with software 2.60, we heard only the alerted beat and no any voice alert.