Bluedio R-WH Wired Stereo Headset for Mobile Phones - Retail Packaging - Red 1. PPS8 (Physical position surround sound) acoustic technology, deliver 5-25kHz detailed analytical sound, 5-25kHz extended spatial sound field as well as home theatre. 2. Incorporate 2 pieces 50mm 50 ultra large subwoofers, and 6 pieces 16 tweeters, generate deep bass effect, great dynamic range. 3. Circum aural ear cushion provide unrivalled wearing comfort. Sound isolating ear cushion filter out unwanted background noise. 4. A cable with button remote and microphone allows for hands-free conversation and control music functions on Apple and Samsung devices, plus track selection(for Apple and Samsung devices). 5. Intuitive operation, and foldable design may easily tucked away to a bag or pocket.