Bluetooth 5.3 chip, low latency, strong stability Technology upgrade: Adopting the latest Bluetooth 5.3 protocol, compared with the previous version (e.g. 5.0/5.2), the connection speed is increased by 30%, the power consumption is reduced by 20%, and the anti-jamming ability is significantly enhanced, especially in the environment of multi-device interference (e.g. office, shopping malls) and still be able to maintain a stable transmission. Gaming/viewing experience: latency as low as 60ms (almost senseless to human ears), perfectly adapted to handheld games and drama scenes, no lag in audio and video synchronisation. Foldable design, portable storage Structural optimisation: the headband of the headset supports 180 rotational folding, the ear cups can be folded inwards to a flat state, with the exclusive storage bag (included in some versions), easily put into the side pocket of the backpack or luggage, commuting, travelling scenarios to save space. DURABILITY: Adopts high-strength metal swivel, after 10,000 times of folding test, to ensure long-term use without deformation. Hi-Fi grade sound quality, immersive listening experience Hardware Configuration: Equipped with 40mm large-size moving coil unit, frequency response range of 20Hz-40kHz (beyond the limits of the human ear), deep low-frequency dive, medium and high-frequency translucent, suitable for pop, rock, classical and other music genres. Tuning style: tuned by a professional acoustic team, default EQ mode emphasises vocal resolution, supports APP custom tuning (need to match official APP). Long battery life, fast charging support Battery performance: Built-in 800mAh lithium battery, about 40 hours of battery life when ANC active noise cancellation is turned on, and up to 60 hours when noise cancellation is turned off (low and medium volume test). Fast charging technology: 10 minutes of charging can play for 3 hours, complete charging takes 1.5 hours, Type-C interface is compatible with mainstream mobile phone chargers. Intelligent noise cancellation, environment adaptive ANC Active Noise Cancellation: Adopts feed forward + feedback hybrid noise cancellation technology, noise reduction depth reaches -35dB, which can effectively shield the underground, aircraft and other low-frequency noise. Transparent mode: one key to switch to the ambient sound mode, no need to take off the headset to have a clear dialogue, to protect outdoor safety. Comfortable to wear, not tired of wearing for a long time Ergonomic design: the headband is lined with memory sponge + protein leather material, the ear cups are made of breathable and skin-friendly inert sponge, weighing only 230g, continuous wearing for 2 hours without any obvious compression. Adjustability: The headband supports 5 levels of expansion and contraction adjustment, and the ear cups can be rotated 90 to fit different head shapes.