How to pair: in power off mode, press the power button for 7 seconds until the LED light quickly flash blue and red at the same time Features: – Latest Bluetooth 4.1 Technology. – Premium drivers that deliver deep rich bass. – Water resistant ipx6 rated. – Secure fit, comfortably stays put in your ears. – Lightweight comfortable design. – Rechargeable battery. – extended wireless range. From CA, US. We own a top tuning team locally. Design simp Bluetooth headphones tuning, we want users to hear there is no stain, low distortion, uniform diffusion of music.