It may not be a $300.00 SENA but, Damn, @ $35.00 I've got a smile on my face.
Admittedly at highway speeds it is sometimes hard to hear … But I've had it for a year now and it still works like day one.
BTW, I went without the foam speaker covers, more room for my big ears.... and different helmets will yield different results.
Just Google " BT-S2 " and you'll find a lot of outlets, Including Amazon, And a lot of different prices.
Here are a dozen more YouTube videos: