motherboard speaker question

[stuckinasquare3]

What "specs" is the little piezoelectric POST speaker supposed to be? I want to go buy one at radioshack and I'm not sure what to get. The mobo is 4 pins but the speakers are 2 wires. Which one do I get?

Thanks

 

[Zap]

How about buying one made for motherboards?

 

[Rifter]

How about buying one made for motherboards?

Are you kidding? that would be way to easy