Yes, the Griffin Evolve iPod Speaker is compatible with the CoolStream Duo. You can plug the CoolStream Duo into the 30-pin connector and stream music to the Griffin Evolve from your iPhone. The CoolStream Duo works with ALL iPhones and ALL Android phones.
The CoolStream Duo turns older docking stations like this beauty from Griffin into Bluetooth speakers. The 30-pin iPod connector powers the Duo and is also the audio jack for the music coming from the paired phone.