These look like re-branded bt headphones that has been around for over a year from dozens of different "manufacturers" slapping their brand name on it. At this point you can get similar two-earbuds-on-a-string wireless bt4.x w/aptX for half the price. YMMV, but they have shallow insertion, stick out too much, and battery life is poor. For the best fit you will need comply foam tips or large enough tips to wedge these in your ears.