ANC stands for Advanced Active Noise Cancellation. Big 40mm diaphragm for full-bodied sound 8.0 CVC technology to improve the clarity of the audio 6-microphone array for calls that are crystal clear Auto Play/Pause with Auto Head Detection 30 hours of replay Premium ADi noise reduction chip with patented ergonomic design Transmission Version: V5.3 Wireless Distance: at least 10 meters Regularity Reaction: 20–20 kHz Impedance: 322 Rated Power: 10 mW Driver Unit: 40 mm Capacity of battery: 600mAh/3.7V 450mA of input Play Duration: 30 minutes Time on Standby: ≥40 hours Time Spent Charging: 2-2.5 H