I use when I'm on the road. I don't like having cables everywhere when I'm moving because they get in the way and strain my ears. This little device solves the problem, but it's not without its own shortcomings.1. The range is bad. When plugged into my Galaxy S7 Edge and slipped into my pocket, the audio tends to break up and disappear a little more than I can stomach. It seems to be mainly due to the relative movement between the handset and the phone. If I move the phone from my pants pocket to the breast pocket of my work shirt, the problem mostly goes away. I mainly listen to podcasts, so sound quality isn't of the utmost importance to me. However, the toggle on and off is very annoying when trying to listen to someone speaking on a podcast. Bottom Line: For a satisfactory connection, both devices must be stationary and less than 3 feet apart. I've never had a Bluetooth device with such limited connectivity. Attribute this to the small size of the device, which limits hardware capabilities. It's clear. For that reason, however, this device does not replace my J-Birds as mobile apps. Tends to loosen and fall out of my ear. I use it without the rubber end and have found that I have to slide the device back in from time to time or it will fall out and hit the ground. Generally to be expected for things like this, but worth noting. I can't say if using a piece of rubber will solve this problem. Conclusion: Not a decisive factor for me. Bottom line: if you're interested in something that gets rid of cords and you don't care much about care, go for something bigger that's capable of a better connection and stays in your ear better. If you REALLY care about being careful, that's the best you can do right now, at least based on my research. Much luck.
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