• Active Noise Reduction
• 50 hours on one battery
• 20HZ - 22kHz frequency response
• Ear cups with premium grade leatherette pads
• folds flat for compact and easy transportation

The Jabra C820s stereo music headphones are specially designed for music lovers who want to make the most of their music wherever they are. The Jabra C820s are high performance headphones that deliver full-range, compensated sound through high quality speakers guaranteeing premium audio, straight from your mobile phone or other music source. Hear the music, not the noise thanks to one of the best ambient noise cancellation systems on the market. The headphones incorporate Active Noise Cancellation technology, offering one of the best ambient noise cancellation systems available today. So, no matter how noisy your environment is, you can still enjoy your music undisturbed. How does Active Noise Cancellation work? Anti-noise is an inverted copy of the noise itself. When anti-noise is combined with the original sound disturbance it results in a lower level of noise perceived by the human ear. The Jabra C820S comes with all the connections you need to use it in virtually any environment. For use on the move, the Jabra C820s folds flat for compact and easy transportation. It comes equipped with a standard universal 2.5mm jack for mobile phones and a 3.5mm jack for music players. For use in an airplane, the flat-pack carrying case also contains a 2-prong airline adapter. For use at home, a 6.5mm audio adapter is included, or you can use the standard 3.5mm jack. Note: These headphones are nearly identical in performance to Bose QuietComfort headphones for a much lower price!

These headphones are a great buy and I would suggest them to anyone who is constantly listening to their mp3 player. I have used both sony and bose noise cancelling headphones and the Jabras work just as well either of these more well known brands. The Jabras exceed sony headphones in every aspect and are just as good as the bose. For a college student who has a low cash flow the Jabras are a perfect pick. I purchased these for about half the price of the average bose noise cancelling headphones and have not been dissapointed yet!

Works as promised. Very comfortable. The active noise cancelation puts you into your own private world. Wonderful product for hundreds less than the competition.

I travel quite a bit and have been looking for noise cancelling headphones for over 1 year. I did a lot of research: read a ton of reviews and tried several headphones. After all that resarch, I found that the Jabra c820s are the best headphones of all the ones I read about or tried.

I researched online for a long time before actually buying a set of headphones. I read about the Jabra's and several others, including Bose. After several months of reading, I finally got tired of not having headphones and decided to buy a set of the Brookestone on-ear headphones from the airport in Houston. I tried the headphones on my trip home to Seattle and found that after about one hour the headphones began to hurt my ears. They were small and lightweight, but began to get uncomfortable after a while. Additionally, I didn't notice a siginificant difference in noise cancelling. Music sounded better than my normal iPod in-ear headphones, but I didn't think it sounded significantlly better.

I decided to exchange the headphones on my next trip. I exchanged the on-ear version for the around-ear headphones at Chicago O'hare. While the over-ear version of the headphones was more comfortable and blocked the noise slightly better than the on-ear headphones, the sound quality was the same and I felt that it wasn't worth the price. Plus, the headphones weighed more and the size was too big. So, I decided to return the headphones and buy the Jabra c820s.

I am reluctant to buy things online. I like to have a store that I can take things back to in case I have problems. That's why I bought the Brookestones first. However, since I couldn't find anything as good as the reviews made the Jabra headphones sound, I finally took the plunge. I bought the headphones right before my trip to Hong Kong. I wore the headphones on the longest leg of the trip for 10 hours. The headphones are extremely comfortable. The sound quality is phenomenal. I watched in-flight movies, listened to my iPod, and just tried the noise cancelling feature. In all aspects the headphones performed extremely well. The best feature about the headphones is the fact that you can listen to music or movies without turning on the noise cancelling feature. The sound quality isn't as good, but at least you know that you can still listen if the battery dies, which happens to last for up to 50 hours.

I am actually writing this review from my hotel room in Hong Kong. I love the headphones and recommend these to anyone looking for high quality headphones for a reasonable price. I will update the review if I have anything else to add or change.

When I first started using it, I thought the sound quality was terrific, and the noise cancellation was not quite as good, but almost as good as, the Bose QC3 that my partner owns. However, after a few minutes, I took the headphones off with the music on, and I noticed that the sound leaked in a serious way (I was not listening to the music very loud). I put the headphones back on, and my partner told me that he could still hear my music clearly. So this was a big negative. Then, after about a month, with the noise cancellation on, the left headphone made a popping noise, then serious static noise that wouldn't go away. The static noise continues every time I tried using it afterwards. The headphones can now only be used with the noise cancellation OFF. This completely defeats the reason I bought these headphones.

I live in a hi-rise and I bought these for a couple of reasons. Often people are doing noisy construction which reverberates all over the building. With some music playing through these, the noise is minimized or absent. Also, when I go to the health club to work out frequently the 2 tvs are blaring out or personal trainers are barking instructions at people and when I wear these I can block that noise out and concentrate on my work out. Today they are blocking out the sound of fighter planes crashing over my building during our annual air and water show. They are very comfortable and the sound quality of music is good, I am very please with them.