Bluetooth 5.0 more stable connection. Premium hifi sound composite biofilm. Binaural HD call intelligent noise reduction. Smart touch operation convenient operation. Real-time power display. Built-in 1500mAh large capacity polymer battery. 40 hours long battery life. 30 degree ergonomic in-ear angle. Switch left and right at will, use single or double headphones at will. Smart touch function. CVC 8.0 noise reduction technology with silicon microphone, binaural stereo, non-destructive noise reduction.