TaoTronics TT-BH23 Wireless Neckband Headset with Noise Cancelling Mic

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•TT-BH23 User Manual

TT-BH23 User Manual.pdf  

FAQ

I've been to Wal-Mart, and many other areas with Wi-Fi, and have not had that problem. The only thing I can think of is there is other Bluetooth signals interfering. Check the WiFi connection in those areas to see if your phone may be trying to connect to another device other than yours.
I do not have experience with other models. The bass is not strong, but the sound is crisp. The sound is as good, if not better, than any wired earbuds i have had.
For those who just said "terrible" or "awesome" Keep in mind sound quality is relative to the listeners ear and in my opinion also relative to pricing. For this price point, I can't see where there could be much or any improvement of sound Q on these headphones. There are of course shortcomings in the high end and the low end, BUT it's very very good for the price. I will just leave it at that. If your wanting to know if it's worth the money, the answer is yes they sound brilliant for $20 Bt headphones.