Simple, slim fit and super comfy headphones with round, soft, replaceable ear cushions. aHEAD II headphones have high sound quality and active noise cancellation (ANC)Included is a handy set of washable sports cushions. Perfect for workouts. Features Up to 25 hours playing time Charging: 1.5 hours Active noise reduction (ANC): A technology that via small microphones and speakers creates a kind of "noise" in the ear canal that people can hardly hear. This makes the noise around you almost completely disappear, and provides more enveloping sound without interference. Extra set of ear pads for training: Washable pillows included. Perfect for when you need to train. Replace the pads easily with a single click Environmental noise cancellation (ENC) Dust and water repellent (IPX4)