First， there is the second generation 4.0 Voice newspaper， (ie Chinese newspaper call out call number); 3.0 calls only sound system comes with ringtones.

Second， the second generation 4.0 down song cut song; 3.0 do not operate on the song in the headset can only be on the phone to manually cut the song.

Third， the second generation 4.0 Click the button to toggle the heavy volume the next song， press down firmly to adjust the sound volume， say YES to answer the call， hang up say NO， you can manually press the answer key to answer or hang up， continuously press 2 to answer under dial number.