Bluetooth V5.3 headphones with ANC and ENC technology. ANC is active noise reduction. The headphones effectively eliminate unwanted sounds from the environment, allowing you to completely immerse yourself in music or movies. ENC, on the other hand, is blocking surrounding sounds. During phone calls, ENC actively filters out ambient sounds, focusing on your voice, which makes the other party hear you clearly, even in noisy environments. Working time on a single charge using the ANC function is 4-6h, with ANC off 5-7h. A magnetic case with a charging station is included. Charging time: Around 1.5H, Battery of Earbuds: 40 mAh Lithium polymer Battery, Battery of charging case: 350 mAh Lithium, polymer Battery, 3 cycle charge to earbuds, 22h Playing.