Optical out on a Macbook

[Gadgetron]

Hello,
Ok so from the apple site they claim that the Macbook has "Combined optical digital output/headphone out (minijack)"
Quick question what adapter do i need to do optical/audio out?
Thank you

 

[carfac]

http://store.apple.com/1-800-MY-APP...F2tTN2cdr1r82Gjq1IsA/1.0.19.1.0.8.25.7.11.0.3

Belkin PureAV Digital Optical Audio Cable with Mini-Toslink Adapter