Use the NEW Skullcandy Soft Switch Panel sewn into the mid-strap to control power, volume, and phone function. These specially tooled waterproof drivers along with Mobile-Mic buried in the strap allow you to listen to music and take phone calls completely hands and headset free The LINK Pack integrates award winning LINK technology directly into a fully ballistic nylon daypack. BUT WAIT! This bad boy is fully armed with a AA battery-powered amplifier that fires sound out of 6 mm speakers embedded in the upper straps.