Powerful Multifunctional Button: Changing music tracks, playing or pausing media, managing calls and activating the voice assistant function is easy with just one button, making the design of your glasses fashion and easy to use.Amazing After-sales Service: If you have any questions, please contact us through the contact information in the user manual or directly online, we will reply you within 24 hours. We offer lifetime warranty, if you are not satisfied with the product quality, you can contact us for replacement or refund.Latest Bluetooth Version 5.3: LVTEL M6 Pro is smartly compatible with all kinds of Iphone and Android mobile phones, which makes the connection faster and more stable, so you will never worry about Bluetooth interruptions again!Polarized Sunglasses Lenses: LVTEL smart glasses features UV400 polarized full-protection lenses protect your eyes from the sun with excellent color, clarity and contrast.Ultra-high Quality Battery: Considering the user's long term experience, LVTEL Smart Glasses are powered by a high quality battery, which takes only 2 hours to fully charge and can be used for up to 8 hours of continuous playback, which is both durable and safe.Built-in Microphone and Speaker: With the LVTEL M6 Pro, you can take calls hands-free,listen and speak clearly thanks to the covert omni-directional microphone built into the bezel.