Advice wanted on wireless, office friendly headphones

Hi all.

I'm after some recommendations for wireless headphones for work.

I'm speciffically after some that enable me to hear the phone ring and/or my colleagues yelling my name. (Obviously, I'll be listening at a fairly low volume.)

My listening material at work is mostly rock and pop and is sourced from a collection of MP3s on a Dell PC. (Not, I admit, the best source ever.)

Thanks

Andy