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Sony WH-CH520 Wireless Headphones Bluetooth On-Ear Headset with Microphone - Open Box

<ul><li><strong>Extended Listening Time</strong>: Enjoy music and calls longer with a 50-hour battery and 1.5 hours of listening time from a 3-minute Quick Charge.</li><li><strong>High-Quality Sound Restoration</strong>: Digital Sound Enhancement Engine (DSEE) faithfully restores audio to produce sound closer to the original recording.</li><li><strong>Hands-Free Communication</strong>: A built-in microphone allows you to take hands-free calls.</li><li><strong>Wireless Device Connectivity</strong>: Ten-metre Bluetooth wireless range allows for easy connection to your devices.</li><li><strong>Simultaneous Device Connection</strong>: Multipoint connection allows you to connect to two Bluetooth devices at the same time.</li></ul>

<ul> <li>Enjoy your music and calls longer with a 50-hour battery</li> <li>Quick Charge: 3 minutes gives you 1.5 hours of listening time</li> <li>Our Digital Sound Enhancement Engine (DSEE) faithfully restores these to produce high-quality sound that&rsquo;s closer to the original recording</li> <li>Built-in microphone lets you take hands-free calls</li> <li>The lightweight build and swivel earcups gently slip on and off, while the adjustable headband, cushion and soft ear pads give you all-day comfort</li> <li>Ten-metre Bluetooth wireless range allows for easy connection to your devices</li> <li>Multipoint connection allows you to connect to two Bluetooth devices at the same time</li> <li>Google Assistant, Amazon Alexa, and Siri voice assistants allow for easy operation</li> </ul>

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<div> <div> <div class="description_1N8uX">Listen all day with the Sony WH-CH520 on-ear headphones. These headphones are powered with a 50-hour battery. It features a lightweight over-the-head band and padded cups to ensure optimal comfort, and the ten-metre Bluetooth range allows for easy connection to Bluetooth compatible devices. They&rsquo;re also equipped with a built-in microphone for crisp, hands-free voice calls.</div> </div> </div>

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I wasn't sure what to expect when I purchased these being deemed “open box “

they look and function as brand new and I'm extremely happy with my savings!(I paid $60 which I believe is roughly half of new) 
 The sound is excellent and the battery life is ridiculously good.
 I used these for a couple of hours a day every day. And after five days the charge had barely depleted at all

Great wireless headphone

Excellent sound and a lot of extra features with the app

Great value

Lot of people will find this Sony doesn't have enough bass . 😩
Heres the Solution how to activate the Sound Engine with full audio Amplifier in your iphone.
you need fx bass boster music player ( sound engine )  from app store . get the purchase your own subscription its cheap ! 
you need 3utools in windows pc .
connect iphone and drag your 320 kbps audios using 3utools . 
all your audios will be in music player library . in the Music player turn on Bass , turn on volume boost . and customize your perfect EQ frequencies.
Make sure you have downloaded Sony Connect app also from store and connected. and also you need to turn on Clear Bass in sony connect and customize your own EQ . do not bad mix frequencies may result bad sound or polluted frequencies. 
Boom 💥 Hope now you are listening most out of Iphone special audio hardware amplifier power and Sony clear super Home theatre Bass ! 
another way to add music from pc to this music player is 
To add music files using Wi-Fi sync, go to the Downloads tab, click on Sources, then tap on Wi-Fi Sync. After that, go to the URL mentioned on the app on your computer browser. Upload the songs you want to play with the Equalizer FX app there. Then press the Access File button, select songs, and press on Download button, and it will appear in your Downloads tab.
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How to get Super Bass in Sony Wireless!

Perfect for our needs at the best possible prices! My kids each have their own helmets. Excellent sound and helmet is good quality

Perfect for our daily life

Lightweight, efficient, finally comfortable headphones! - Oh, my God.

I like it! - Oh, my God.

worked great on my Android/apple phones, but didn't read the fine print that it can't be used with laptops

Not for laptops, just Android/apple devices

Don't pair easily with macbook and iphone

Small ears

Good sound! for the price!

Poor Sound Quality and Damaged Box. Sounds comparable to $20 headphones.

Poor Sound. Damaged Box.