Are these speakers of mine good enough ?

[Tigurinn]

Hi, this is the technological specificiations I was able to get about my mobile phone - which I use every night and day (in my shirt pocket and in my winter jacket), with the ultrasonic version.

"•Frequency response: 20Hz to 20,000Hz"

I'm hoping I've bagged a good one ?

[Shannon]

Hi, this is the technological specificiations I was able to get about my mobile phone - which I use every night and day (in my shirt pocket and in my winter jacket), with the ultrasonic version.

"•Frequency response: 20Hz to 20,000Hz"

I'm hoping I've bagged a good one ?

That's standard CD recording and playback specs, and will work just fine.

[Tigurinn]

Thank you.