Lightspeed ZULU.2 (Straight Cord, Dual GA Plugs, Battery Power) With patent-pending Microport VentSM technology, the new Zulu offers greater ANR consistency and performance over a deep, broad range of low frequency noise. The magnesium ear cup is superior at blocking out high frequency noise. Weighing in at about 13 ounces, the LightcomfortSM design includes plush ear seals, exceptional fit and 15% less side pressure. The new Zulus full-function Bluetooth connectivity provides enhanced sound quality for voice, Bluetooth-enabled phones, streaming stereo music or compatible audio devices. Never miss important radio communications with patented ComPriority which lowers the volume of any auxiliary device automatically during radio or intercom transmissions. An integrated control box auxiliary input offers an additional option for connecting a cell phone, music player or other audio device