Hi everyone.
I have MikroTik RB750G, RouterOS: 4.16
When i typing in terminal
beep frequency=660 length=100ms
or just “beep” it didn’t do that beep 
Why? What i do wrong? Or beep is broken on hardware level ?
no beeper..
Really 
But there says http://www.mikrotik.com.ua/next.html?hard&mb&rb750g “Дополнительно: Кнопка рестарта, пищалка”
пищалка = beeper.
And there,as i see this is official site, no one word about beeper http://www.routerboard.com/pricelist.php?showProduct=90
Not same information on 2 sites about same product 
Thank you for answer.
The .ua site uses another version of the .pdf brochure than routerboard.com. If you check the brochure in english it seems that only the word “beeper” is extra 
The 750 and 750G has never had a beeper..
I would like them to have though
error in the brochure, there are no beepers on RB750
Is there any way to add a beeper?
yes, get RB450 instead
I was thinking about something else, like soldering a beeper on the PCB.