These protect from dangerous noise, but allow hearing surrounding sounds. Weak sounds are enhanced, and loud impulsive noise is efficiently cut out. Active protection function smoothly regulated volume ensuring reproduction of comfortable sound, reducing irritation, and allows distinguishing surrounding sounds (speech, car transport noise, and warning signals) in the stereophonic mode. Digital sound preproduction diagram removes sharp flips. Preservation of the last setting in the memory when shutting down. Automatic shutdown function ensures battery power saving in two hours of inactivity. In case of reducing battery change level, warning signal appears before final shutdown. Auxiliary input allows connecting a cell phone or radio communication device.
Fields of application: civil airports, timber works, road works, construction, handling, and pneumatic hammering operations, concrete production.
Battery: 2 AA batteries: 1,000 hours.
Weight: 370 g.
* SNR=32 H=31 M=29 L=24
TR CU 019/2011, TR CU 020/2011
(GOST R 12.4.208-99, GOST R 12.4.210-99)