Although the phrase ‘self-destruct’ might bring to mind a James Bond movie, It’s a tad bit too bombastic in Persian.
The current translation’s word for self-destruct is incorrect, meaning “destructive”. Additionally, زمان‌سنج as a translation for ‘timer’ is quite unfamiliar in Persian.

Based on the above, I suggest زمان حذف خودکار, meaning ‘Time of automatic deletion’. A literal transliteration of ‘timer’ as تایمر can also be suggested, as it is a loanword which has found common use among people.