From their site :-
Immerse yourself in your playlist with the help of the Panasonic RP-HC200 Noise Cancelling On-Ear Headphones. With a frequency response of 10Hz to 21kHz, these headphones deliver great sound quality.
Key Features
Featuring an 81% noise-cancelling technology, the Panasonic RP-HC200 Noise Cancelling On-Ear Headphones lets you enjoy your music by blocking out ambient noise.
Powered by AAA batteries, the RP-HC200 Noise Cancelling On-Ear Headphones lets you listen to your favourite tunes for up to 60 hours.
Thanks to the Panasonic RP-HC200 Headphones’ fold-flat design, these headphones are easy to store or take with you.
Get a comfortable, snug fit with the Panasonic RP-HC200’s easy slide adjustment.
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