Bluedio R+ Bluetooth Stereo Headset for Mobile Phones - Retail Packaging - Red 1. PPS8 (Physical position surround sound) acoustic technology deliver detailed analytical sound, extended spatial sound field as well as home theatre. 2. Incorporate 2 pieces 50mm ultra large subwoofers, and 6 pieces tweeters, generate powerful bass resonance. Circum aural ear cups provide unrivalled comfort. 3.Get rid of bunch of cable, enjoy your favorite music via Bluetooth and micro-SD, connect with smart phone, tablet or PC wirelessly. 4.50 days standby time, 25 hours music and talk time provided by Bluetooth 4.0, thus, CVC wind noise reduction remove noise for far-end listener and intuitive operation, stay connect with the world while immersing in your music world. 5. NFC(Near field connection) rapid connection also give you biggest convenient, get free from trouble pairing procedure.