Crystal clear sound quality Comfort & Flexibility: Answer or end HD calls, control your music by pausing/playing and control the volume.Bilateral control of both headphones via touch (Binaural Smart touch control)Noise Cancellation: They have CVC 8.0 noise cancellation technology, to block unwanted noises. Long Battery Life: With a powerful 2000mAh battery, you can use them for up to 140 hours. The included magnetic Power Bank Charger can charge not only the headphones, but also your phone. Technical Specifications: Model Number: F9-5C Certification: RoHS, CE, FCC Battery Capacity: 2000mAh Charging Voltage: 5V / 1A Voltage Input: 5V Input Power: 20MW * 2 Material: ABS Connection Distance: ≥10m Color: Black Enjoy unparalleled sound quality, comfort and style with these wireless stereo headphones.