QZTELECTRONIC Bone Conduction Glasses, Open-Ear Headphones Bluetooth, Photochromic Sunglasses Anti Blue Ray, IP6 Waterproof Audio Glasses, Hand-Free Calling and Music, Smart Glasses for Women and Men

UV Protection Coating coating Open-ear Bone Conduction Headphones is different from tradition headphones. They keep you aware of surrounding, and meanwhile deliver sound directly to your inner ears by sending vibrations through the skull bones bypassing the eardrum to protect your hearing. CAUTION: For better listening experience, Item is not recommended for customer with bone conduction dB HL (hearing threshold) above 40db HL.

Photochromic and Anti Blu-ray Lenses - the tint of lenses will automatically change based on sunlight/UV intensity when in outside (UV420 protection). When back in door, lenses will return clear. Blue light glasses blocks harmful blue-ray emitted from electronic devices screens.

Hand-Free Calling&Podcasts - with this wireless smart glasses, you don’t have the hassles of picking up your phones while you are driving or jogging. The buttons in the frames provide easy access to control volume, answer/hangup call, switch songs, pause/replay music etc. For best listening experience, keeping Bluetooth devices at 50%-60% volume is recommended; maximum 100% volume may lead to sound leakage or echo during calling.

4.2 Version Bluetooth and Dual Pairing - provides access to iOS/Android devices, like cell phones and laptop, and enables simultaneous dual Bluetooth devices pairing. 4.2 Bluetooth ensures fast&stable connection and up to 10 meters barrier-free wireless range. (P.S All bone conduction headphones in the market will have sound leakage, which is normal when you keep the volume of your device over 70%).

Great Battery Longevity&IP6 Waterproof - 250 mAh battery fully charged within 2 hours--better use 5V 1A charger (not included), supports 10 days of Standby, 4 hours of playback and 3 hours of conversation(Test under 50%-60% volume). IP6 waterproof rating endure raining or sweat from outside activity and easy maintenance.