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I bought it for an art project, the visual was astounding! But the sound quality was not the best. Used it for phone calls afterwards and it's not really worth it, if you buy it only for phone calls. For my needs, it suited perfectly!
Just for fun i took mine out to a gathering, kept in in my backpack, with cell phone in side pocket.. folks did a few double takes when they saw me using it.. LOL.. very worth it.. and its nice when you are in a noisy room, you can still hear the people talking on your phone without having to use a USB ear piece or head set. brings back memories of the old phones we had in the 70's and 80's
Really helps sound quality on calls especially when talking to my hearing aid assisted mom. Can use cell or handset to answer or disconnect on iPhone. The red button (which I assume should light up when in use) does nothing, but doesn’t affect performance.