Quality stylish headphones with ambient sounds shielding and rotatable padded ear cups Style and design meets high-quality sound with the CNR-HP4/CNR-HP04N. These headphones provide an excellent shielding of ambient sounds. It has a frequency rate from 20-20.000 Hz and enough bass to get the best results. The CNR-HP4 has rotatable padded ear cups and a sturdy, adjustable headband for enhanced usability and convenience. Our headphones are suitable.