Catalog: ELVEX 2008 full catalog | |
| quality low cost model quietunes 660 offers the following features · all components ... and sweat affecting the life span of the electronics · the radio has fm and ... battery compartment a fresh set of batteries provides about 150 hours of ... using nickel metal hydrate batteries a 120 volt charger is included · just in case ... you forget to turn off your radio headset we have incorporated ... safe 82 db level · independent testing of the attenuation has established a noise ... reduction rating of 22 db nrr and 27 db snr to ce en-352 ... hz mean value db std deviation 125 15.7 3.3 250 19.3 2.4 500 27.1 3.3 1000 ... value db std deviation protection value 125 12.9 3.3 9.6 250 17.6 3.3 14.3 500 28.5 ... | |
