Excellent. I really like it. Range is amazing. No difficulty going from my phone in the basement to the headphones on the second floor.
Battery is amazing. I charged them a day or two after receiving them and that’s it.
Noise Cancelation is high-quality enough for my use, but these are the first high-end noise cancelling headphones I’ve owned. I was between these and the 4.40, but I’m glad I got the 4.50s. Highly Recommended.
You can undoubtedly go through Sennheiser HD 4.50 BTNC Noise Cancelling Headphone.