Nova Poshta & 
Ukrposhta.
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These headphones are designed to protect your ears from loud shooting sounds,
as well as to provide you with the opportunity, when necessary,
to hear non-loud ambient sounds, warning signals, and equipment sounds.
This model provides:
- the function of automatic volume control of sound, amplifying weak sounds and weakening strong ones.
External communication and the function of automatic volume control do not depend on each other;
- manual volume control;
- The function of automatic volume control when working in stereo mode;
- the function of storing in memory the last setting when turned off;
- priority to the external radio signal to be transmitted, even in the event of a power failure;
- automatic shutdown after 2 hours of inactivity,
as well as a warning signal a minute before shutdown;
- a function that, when the battery charge level decreases, signals this.
Signals are issued every 30 seconds for 5 minutes before turning off the headphones;
- polarity protection, preventing damage to the circuits in case of improper insertion of batteries;
- reduction of noise at high frequencies - 31 dB;
- reduction of noise at medium frequencies - 28 dB;
- noise reduction at low frequencies - 16 dB.
- protection against loud sounds up to 190 dB (all light and noise grenades)
Battery life is 600 hours. Batteries are placed in a waterproof unit.
In LIBERATOR III there is one compartment for batteries with a closing lid,
which increases resistance to moisture penetration.
Headphones are waterproof, i.e. remain in working condition after extraction from water.
Headphones weight –355 g.