欧美日韩视频一区二区在线观看_欧美成人一二三区_日韩视频在线观看一区二区三区_av制服丝袜国产在线_国产一本二本三本在线观看

?Versatile angle adjustments for flexible wearing options
?Soft,wide and foam ear cushions 
?Lightweight,ensuring ease of use                                                         
?Excellent noises attenuation effect 
?ANSI, NRR: 23dB   
?CE EN352-1, SNR: 25dB