The BbTalkin wake and cable advance starter pack 4-way is a pack for 4 people. In combination with the standard equipped cable and wake headset (B06C) you are able to stay in contact with your students while riding. It’s a hands free system so you are still able to steer the boat while you communicate with your student. Your options for the other students depends on your helmet and setup. The mono helmet speaker pad (B02R) is for mono and left side only. The stereo helmet speaker pad (B03R) is for left and right and gives you stereo option for music to. We also have the special GATH helmet speaker pad (B02G) and are only optional if you use GATH helmets only.