Brand: ‎Srhythm Features: Digital Active Noise Cancelling Technology(ANC): Professional advanced noise cancellation silences up to 90% of machine noise. Cancels noise from aircraft, subways, cars and crowds, so you can focus on what are you doing. (Kindly Note: it’s NOT 100% noise cancellation, Human talking CAN NOT be eliminated and ANC is less effective in quiet environments). ANC Works well both wired and wireless Provides High-Res Audio in Silence: Features a dual 40 mm HD high-resolution audio driver, along with 360° omnidirectional noise-cancelling ANC technology, a high-response diaphragm, lightweight voice coil. Delivers peerless sound with no interruptions. Sometimes quality just needs to be heard. Find the rhythm of your soul 50+ Hours Music Enjoyment: A built-in 1000mAh battery won't allow your headphones power off, you can enjoy your world without noise for 50 hours' long time with a single charge. or plug in 3.5mm stereo audio cable to prolong using time when battery is low Unique Foldable Lightweight & Ergonomic Design: The professional-grade protein ear-pads,100° inward rotation and 120° inward folding ear-cups with superb LIGHTWEIGHT only 0.4 lb for maximum comfort, even during long periods of use. Folds away compactly for easy storage when travelling. Ergomonic headsets' structure and multi-level adjustable headband to get the best suitable size for you Low latency gaming mode: Only press the Multi-function button three times, enter the low latency gaming mode. Enable you to experience the immersive gaming environment with seamless music Details: [ , , Bluetooth headphones can be connected to 2 devices at once for easy switching. You will not miss the phone call when you are watching movies. Please refer to the manual for specific pairing steps. How do active noise cancelling headphones (ANC) work? 1. First,record the low frequency noise (50-1000 Hz) in the noisy environment, the speaker microphones placed in the earpiece. 2. Second,conduct noise in the control circuit and the control circuit performs operations in real time. 3. Finally,the horn sends sound waves of opposite phase and amplitude to eliminate the noise. Srhythm NC25 Noise Cancelling Headphones Multi-point rotation ear-pads with adjustable headband,180g only Srhythm NC25 with Advanced active noise reduction technology cancels 90% of stable low frequency background noise,