Review on Invisible Single Ear Wireless Earbud Bluetooth Headset with Mic - 6-Hour Playtime and USB Charging Dock - Sweatproof Sport Earbuds by Carlos Deuschle

February 2021 update: These are by far the best bluetooth headphones I have. This is the first one I've ever bought, about 2 years ago. I have since purchased several different individual Bluetooth headphones. I love having them everywhere, loaded and ready to go. I mainly use them to listen to books or podcasts. None of them are even half as good when it comes to charge retention, transmission distance, clarity and volume. I've accidentally dropped this thing a few times and it has never opened up or affected its performance. Other parts I've had won't withstand an accidental drop, they'll spring open, or a piece of plastic will break. The durability of this thing is amazing. (Previous Rating) Works well enough for my purposes. I got this specifically for listening to books while doing housework or trying to sleep. For these purposes it suits me. It's too big for my ears so I have to switch it from my left ear to my right from time to time because it's starting to bother my ear. But I have small ears. No adjustment is required to switch from right ear to left ear, making it easy to switch back and forth. I don't think I can use it for exercise or anything else where I will be moving a lot because it will likely fall out. It charges quickly and keeps a charge for at least 10-12 hours in standby mode. If I forget to set a timer so my book turns off when I go to bed, it plays all night and in the morning the headphones tell me the battery is low. The assortment is good. I can leave my phone on the kitchen table and it stays connected in most rooms. It starts to get static when I'm about 30 feet from my phone with walls in between. A good buy for me, especially for the price. And as it turns out, I got the call while writing this review while still having my headphones plugged in. I answered the call and my son heard me perfectly. Glad to know it works well for that too!