Review on JLab JBuds Air Sport True Wireless Bluetooth Earbuds + Charging Case, Black, IP66 Sweat Resistance - Class 1 Bluetooth 5.0 Connection, 3 EQ Sound Settings: JLab Signature, Balanced, Bass Boost - Ultimate Audio Performance for Active Lifestyles by Kai Wen ᠌

The sound is disgusting. This is the cheapest I have heard, despite the great experience of Aliexpress. Any headphones for 500r will sound decent. It is not clear which two drivers are involved. Periodically, the connection falls off from each other. At the beginning of playback after a pause, there is always a delay and a gradual increase in sound. That is, when you turn on music or a video, they will not start playing instantly, but with a delay of about a second. The charge is kept very little compared to any analogues.