HRXS220A PELTOR WorkTunes professional ear protectors provide protection against potentially dangerous noise in the workplace while allowing undisturbed FM radio listening; flexible and easy operation thanks to the integrated antenna; connecting 3.5 mm stereo connector to connect external devices; automatic power off after 4 hours of non-use saves energy • Voice-guided menu: - Volume (8 levels) - Channel seek (up to 5 channels) - Channel memory (up to 5 channels) - Radiofrequency • Operating time approx. 40 hours • Automatic switch-off • 2 x AA batteries