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?Suppress noises exceeding 82dB
?Amplify weak sounds                                
?Sound activated compression -0.01 second reaction time  
?Recessed volume control knobs
?Foldable for easy storage
?Auto power off in 4 hours (option)       
?Low-battery notification (option) 
?Rubberized exterior   (option)                                                                                         
?External battery compartment,powered by two AAA batteries                      
?ANSI, NRR: 24dB
?CE EN352-1.352-4, SNR: 27dB