None of the Soundtouch units (10,20 or 30) have a built in CD player. If you have a stand alone CD player, it may be able to be connected to the AUX input of the Soundtouch.
Or, If you have your CD music ripped to the music app on your smartphone (example: iTunes), you can connect your smartphone via Bluetooth and play your music selections from your phone through the Soundtouch.