[. . . ] A2) Charge the accupack for 24 hours before you use it for the first time! [. . . ] B4) Set the volume on the sound source to your normal listening level, or slightly higher. ATTENTION: Listening at high volume levels for long periods can permanently damage your hearing. 2-year warranty When eventually the accupack becomes totally exhausted and cannot be recharged, please dispose of it as special waste. Components from other manufacturers may cause damage to the device and will invalidate the guarantee. When using this product within the European Union, but outside the country of purchase, you must inform yourself about the type approval regulations in the country of use. You must also check whether or not the product needs to be licensed by the national approval authorities. [. . . ] Radio regulations vary from country to country and what is legal in the country of purchase is not necessarily legal in another EU country. [. . . ]