Intelligent noise cancellation: with chipsets and sensors, the headphones offer hybrid active noise cancellation, attention mode and uplink noise cancellation during voice calls. Box contents: Huawei FreeBuds Studio, wireless ANC headphones with Bluetooth in graphite black, including case, charging cable USB-C (English language not guaranteed), quick start guide, warranty card and safety information. Dynamic ANC: The multi-scene perception system, consisting of an IMU1 sensor and microphone system, automatically adjusts noise cancellation in different environments. Attention mode: Activate the ANC button in attention mode to allow ambient noise/set the "voice highlight" mode in the Al Life app to reduce noise. Noise cancelling for calls: the 4 outward facing microphones accurately pick up the sound from the direction of the voice - 2 inward microphones make voices more clearly audible. Dual Antenna: The headphones offer wide signal coverage with dual antenna design, even when the phone is in the bag or other disturbing environment. Low latency gaming mode: the algorithm for encoding wireless audio signals significantly reduces signal latency to provide a more intense gaming experience. HIGH RESOLUTION MUSIC - The FreeBuds have a HiFi audio chip and professional acoustic components and offer a frequency range from 4Hz to 48kHz. The Huawei FreeBuds Studio benefit from the new high-resolution codec (L2HC) and support fast and stable audio transmission at a speed of up to 960 kbps. 24 hours battery life and fast charging: in just 60 minutes the headphones are fully charged and allow music playback of up to 24 hours when the ANC is switched off.