[【Exceptional Optics】UV400 Polarized Full Protection Lens for Great Color Clarity and Contrast. Perfect for outdoor activities. "【High-Quality Audio】The open-ear speaker system allows you to listen to whats around you while an HD microphone provides clear audio for calls." 【Voice Control & Volume control】Smart Cycling Sunglasses with Smart Assistant Technology Like Hand Free Phone Calling and Answering Easily Speak SiriCortana Single click V buttons to increase volumePress and Hold V buttons to decrease volume 【Long Battery Life】Each smart audio sunglasses leg contains an 145mah batteryfully charged in 1.5 hours can support 8 hours talk time 8 hours music time and 200 hours standby time "【All-day Comfort】Our unisex design is ultra-slim and lightweight with a flexible frame thats akin to regular sunglasses. Ideal for outdoor sports or relaxing The smart audio sunglasses are comfortable and trendy."]