Extreme is our flagship product in the sports headphones performance range and is feature rich. The headphone boasts IPX 6 technology and is made from waterproof/sweat resistant and lightweight material making it ideal for running, the gym or general exercise. The headphone gives up to 8 hour play back (10 hour talk time)from a full charge, and can be used up to 10 hours consecutively listening to music or making calls. The ear hook frame along with the ear-fins secure the headphone firmly in place, whilst the neckband is flexible making it a truly comfortable fit.