Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless, Bluetooth, Foldable, Adaptive ANC Over-Ear Headset | For Desk/Mobile Phone & Softphone/PC Connection | UC Platform Compatibility (Black)

TL/DR: Buy these great headphones.With my new telework routine involving up to 8 hours of tele- and video conferencing daily, a comfortable, high quality headset was necessary. My previous ones became uncomfortable after about three hours and the sound quality wasn't great, especially in the MS Teams environment, where echoes and audio defects seem to be the norm.Truth in advertising. I have owned many Sennheiser (over 10) products over the years, and I like the "Sennheiser sound." Some don't like it.Having said that, these headphones are excellent. Great sound isolation and two forms of ANC. Extremely clear audio, and I've been told that my voice is extremely clear. I used them for nearly twelve hours straight (MS Teams, Cisco Jabber, a telemedicine appt, and phone) after the first time I charged them, and the indicator lights said I still had 3/5 charge. I wore the headphones the entire twelve hours, and my ears still felt great. None of the echo chamber "pressure" I get from Bose and Sony ANC headphones that is so fatiguing. And did I mention that the sound quality is fantastic? The headset paired quickly and easily with my phone and computer. I will say that connection is faster, easier, and more reliable using the dongle than using my computer's onboard bluetooth. No idea why, but it is. Range is good, not great. I can get up and head to the refrigerator (30-35 feet, two walls), and the headset remains connected with no garbled communication. Another 15 feet and into the garage, and it gets garbled and the connection drops (both phone and computer). The dongle has about a 5-10 foot longer effective range than my phone.The "cons."1. Price. I got mine through the Amazon Warehouse, and at the ~$140 I paid, they are a fantastic deal. Full MSRP of $400+...maybe not so much, but I don't think any headphones are worth that. For example, Sennheiser Orpheus headphones are otherworldly amazing, but $55,000? Look them up, and try them out if you are ever near the Soundscape. And if you buy them, please let me borrow them a lot. But are they worth it, to me...nope.2. The headphone isolation is so good that you'd likely be screaming on conference calls without realizing it. Sennheiser solved that by piping your voice into the headset. It sounds a little computerized and is definitely strange, at first. It was very weird when I started using them, and I actually was determining whether I could live with it, or if the headphones were heading back into the shipping box. By the end of the first day, though, I didn't even notice it. You'll probably go through the same stages. Give your ears a chance to adjust. It won't be what you are used to, likely, but I'll bet the weirdness fades very quickly.3. The mics are very sensitive. This is a huge pro, but it becomes a con when you are in active ANC modes and drop something on your desk, or scratch your leg. The sound piped into the headset seems vastly out of proportion. The people on the calls assure me that the sound isn't heard by them, but you will hear it...and loud. Still looking to find a setting to mute this. Nowhere near a deal-breaker for me, but it is a con.Durability will have to be determined over time, but I have Sennheisers that are over a decade old, and one set that is 21 years old. They both still work great, and have only needed new earpads in my time of ownership. These seem to be built to the same quality standard, so I'm not expecting issues.Bottom line: Best headphone purchase I've made in a very long time. No regrets.

I bought this for use at home on work calls and to listen to music. I wanted high quality sound with comfort for music, and clear quality input and output for work calls. I have no complaints about this headset at all, except that I feel concerned about getting it dirty or wet due to the cost of the item.The battery life is great, I think I've gone at least 6-8 hours without needing to charge. It's only told me I needed to charge the battery once, I've only charged it a few times in months of intermittent use.The music quality is wonderful. I listen to drum and bass, techno, and similar music and the quality is outstanding. There is obviously some bass missing, but there is a decent enough amount of bass to make it very enjoyable vs regular headphones.I suppose I haven't been able to test the noise cancellation much being at home, but it may also be that I don't notice what it's filtering out. I never notice my HVAC or appliances or outside noises. It does a decent job of preventing people who are trying to talk to me from interrupting my work, but not sure I'd call that noise cancelling.I use the dongle on my laptop, which is nice because the headphones tell you when it connects, and it prevents the laptop from flapping between inputs and outputs. I am sure it would be annoying if I had a newer MacBook with USB-C instead of regular USB, but I don't yet. I also use this with my phone, and it works great for calls and music there too.It has a cool verbal interface where it will tell you with a nice accent "dongle connected" "phone connected" "power off" etc. The ability to pause songs and answer calls just by tapping the right ear is a nice touch. Changing the volume by swiping up and down on the right ear is also pretty cool and convenient.The ear cavity is comfortable, I can wear these for hours without any issues on either the skin or the ear itself.I don't think I could imagine how these could be better unless they figure out invisible materials or make it free.It comes with a nice case too, but I haven't had to take them out of the house at all due to the pandemic.