Prepare yourself for a new wave of innovation. With the technologically advanced FEBELLE Polarized Bluetooth Sunglasses, you’ll never be without your jams again. Working out and training can get monotonous. Bringing your music with you makes those times a little easier. Wearing earbuds can produce a safety issue. With the external speakers, you’ll be able to hear traffic and whatever else is happening around you. The handful of lenses are polarized to reduce glare and keep you in the zone. See more of these nice eyewear in the link. Features of the FEBELLE Polarized Bluetooth Sunglasses Protective Lenses ⇨ Five interchangeable lenses for different light levels. Sunglasses with Polarized Lenses block harmful UV rays. Blue Tooth Technology ⇨ Forget about earbuds and wires that can tangle and ruin your experience. Listen to your favorite music through the frame mounted open speakers. Pair your device wherever you go. Ideal for an Active Lifestyle ⇨ Frames hug the face. Nose pieces help reduce sagging even when sweaty. Wear this cool pair of glasses jogging, skiing, and snowboarding, cycling or mountain biking. Frame Material: PlasticBrand Name: FEBELLE Lenses Optical Attribute: PolarizedLenses Material: PlasticFeatures: Polarized, BluetoothItem Type: Bluetooth Sunglasses Specifications: Transmission range: 10m Usage: Head wear Track: Stereo Charging time: 2-2.5 hours Battery life: 8 hours (talking & headphones), 4-6 hours (listening to music) Battery: 200MAH built-in battery