Review on High-Performance Bluetooth Earpiece Wireless Headset 5.0: Handsfree Business Earphone with 20 Hours Playtime, Noise Cancelling, Mic – Compatible with Android & iOS Phones, Trucker Drivers, Office Use (Grey) by Brad Schaefer

I like the physical on/off switch; I think that's one of the best features. The device fits well and sits comfortably on my ear. My only issue is (unlike the Anglink headphones I've owned for years) this device is much more sensitive and prone to jamming and the audio cuts out badly when I'm potentially close to wifi signal boosters and other devices, those employed indoors and outdoor business people abound. I can't use it as a headphone for my desktop because it's noisy.