In fact, they can be distinguished by a special design. In conjunction with UNDFTD. An olive model was born PowerBeats2 Undefeated, with a bright orange clip (adjusts the length) of the wire, which even now hang on the brave sergeant.
Headphones were designed specifically for the New York State Special Purpose Squad and G-SHOCK x Maharishi GD-X6900M watch. The sound is excellent, bass. The battery life is up to 6 hours. You can enjoy a smartphone, tablet, computer or even Apple Watch.
A source
Military PowerBeats2 Undefeated Headphones