The Auna Jackhammer Construction Site headphones provide reliable hearing protection combined with musical entertainment & a robust construction-site grade ABS design. The flexible ear cups feature a sound-absorbing foam padding that gently eliminates targeted frequencies while the soft leatherette ear pads comfort your ears. The adjustable, padded headband distributes weight evenly to ensure a high standard of comfort, even under permanent use. The total weight of just 325g also helps. The single-sided cable allows you full freedom of movement in any activity. Another advantage is the positive design which positions all of the controls at a centered point. This allows for one-handed operation without any fuss. Adjusting the volume & transmission is simple via a single multi-function knob. The main function keys are right next to each other. Favourite radio stations can be stored on a total of 8 station presets for quick access & any important information can be read using the LCD display. When switched off, such as during a lunch break, the Auna Jackhammer headphones show the current time. The sophisticated sound insulation works to ensure that background noise is almost completely isolated. For safety, the maximum volume is limited to prevent damage to the ear. The removable jack cable & gold plated contacts keep the Auna Jackhammer construction headphones in their long-term grade design. During transport, the jack cable can can be minimized to save space. Power is supplied by 2 standard AA batteries or with optional rechargeable batteries.