Anti-Fog Coating coating【Bone Conductive Headphones】TRUE bone conduction headphones transfer sound though skull bones vibration . Even with your ears plugged, you can still hear the headphones louder. All bone conduction products in the market will have sound leakage when the Bluetooth devices volume keep above 70%. Medium volume like 50% is for better using experience【Photochromic Anti Blue Light Lenses】 audio glasses can block 95% harmful blue light of electric devices. Transition lenses will change automatically to dark Grey ONLY based on intensity of sunlight and ultraviolet light when stepping outdoor, and will keep clear when indoor【Light-Weigh and Comfortable】open-ear Bluetooth glasses with 32g, release your ears from traditional in-ear headphones and keep you aware of your ambient sounds. Made of TR material is more flexible and sturdy to use【4.2 Bluetooth and Long Battery】Easy one-step Bluetooth ensures quick and stable connection and support up to 10 meters barrier-free wireless range. 250mAH battery fully charged within 2 hours ensures over 3 hours of music, 4 hours of conversation and 10 days stand-by【Worry-Free Service】Package includes glasses, protect pouch, micro-USB charging cable, non-slip nose pads, extra lens templates, detailed user manual and exquisite package. We provide 30-day free return and 12-month warranty. Should you have any questions about the product, please don't hesitate to contact us Product Description Track Page Views WithAuctiva's Counter