Polaroid polarized lens/pc lens, can effectively block uv rays and harmful blue light
usb3.0, transmission speed faster
hydraulic telescopic headphones, can rotate 270, can be adjusted freely, wearing comfortable, headphones, power of 5 mw,
high quality audio effect and mp3
polymer lithium battery 150 mah, mp3 for 5 hours, bluetooth talk about 3 hours, bluetooth standby for 30 days
bluetooth protocol v4.1,
charging time:2-3h
bluetooth distance :10 meters