1.It is an amazing design,Imported Polaroid polarized lenses effectively block ultraviolet light and harmful blue light, protecting your glasses 2.Hydraulic retractable headphones 270 degrees rotatable adjustable, wearing comfortable 3.All-round high quality call effect 4.High-capacity polymer lithium battery, sustainable call for 5 hours, Bluetooth standby for 30 days 5.Easy to carry, suitable for use in various occasions 6.Meet the Bluetooth protocol V3.0, can be called at any time, listen to music in the phone, stereo surround two channels 7.Maximum transmission range is 10m, truly no noise within 10m 8.Audio decoder head is 15Bit, frequency is 2.4GHz