LIBERATOR ll radio headphones are designed to protect hearing organs from loud firing sounds,

as well as ensure that, when necessary,

you can hear non-loud ambient sounds, warning signals, and equipment sounds.

Radio headphones provide:

- the function of automatic volume control of sound, amplifying weak sounds and weakening strong ones.

External communication and volume of the automatic sound volume control function are independent of 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, which should be transmitted even in case of 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 ll 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 consist of:

- cups with wire base. The wire base is made of wire with a diameter of 2 mm from alloyed steel with anti-corrosion coating.

The cups are made of a shock-resistant technical thermoplastic resin based on

a copolymer of acrylonitrile with butadiene and styrene (hereinafter - ABS plastic).

The battery compartment is closed with a lid (made of ABS plastic).

The cover has rubber moisture protective consolidation.

Controls on the body of the cup: on/off, volume.

- soundproof rollers. The base is made of ABS plastic with a thickness of 2 mm 

on which the filler is fixed - foam rubber, covered with a thermoplastic polymer of vinyl chloride.

Dimensions soundproof rollers: height 103 mm, width 81.5 mm,

thickness 19 mm. Sound proof rollers are easy to replace and firmly snap-fit.

- microphone (with resistance - 186 ohms). The microphone has a reliable microphone mount

to the headphone cup, which prevents the microphone from breaking off from the headset.

- speech microphone on the bar. The bar is made of wire with a diameter of 4 mm

from high-strength brass alloy with low magnetic properties.

Microphone - dynamic dust and water tight. The microphone has a reliable microphone

mount to the headphone cup and does not break off during operation.

- Headphones are attached to the PTT button with a secure mount.

DUAL version for working with two radio stations.