Need help with finding a buzzer / audio device

hello guys. need finding sort of audio device project. need buzzer can use arduino uno. don't know alot electronics hoped me?

we have limited websites choose components in denmark, have 2 different buzzers. 1 should pick, or have better idea buzzer / audio device. has able make beep sound.

should choose this:
buzzer pcb continuous tone 12vdc 97db
http://docs-europe.electrocomponents.com/webdocs/0f2a/0900766b80f2a587.pdf

or this?
buzzer pcb 75db 3000hz 1.5-24vdc
http://docs-europe.electrocomponents.com/webdocs/009c/0900766b8009c28c.pdf

the main thing see ac right? work arduino?
sorry being noob

it looks either of work.

quote

the main thing see ac right? work arduino?

let's start this:   an  arduino digital output-pin puts-out (about) 5vdc when on , (about) 0v when off.  i/o pins rated 40ma maximum, , actual current depends on impedance/resistance of "load" connect (ohm's law).

what need piezo device works @ 5v , "draws" less 40ma.

there 2 types of "noise making' pizeo devices.   a dc piezo buzzer  has sound generating circuit built-in.   you apply dc voltage , makes noise.

a piezo transducer audio speaker, , need apply ac signal.   

you can use either 1 arduino.   of course, buzzer slightly  easier use.   a transducer requires provide "ac" signal.   you can generate 5v, 2khz square wave switching arduino's output pin on-and-off 2000 times per second (easy in software).   the advantage arduino generating signal, can control frequency (pitch).

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