Bone Conduction Glasses with Open-Ear Headphones, Smart Glasses Dual Bluetooth Pairing, Blue Light Glasses Photochromic Lenses, IP6 Waterproof, Hand-Free Calls and Music, Gifts for Dad, Upgraded

【Photochromic Lenses】featured with UV420+ transition lenses, the tint of lenses will automatically change based on sunlight/UV intensity when in outdoors and will return clear when back indoor. Blue light glasses blocks harmful blu-ray emitted from electronic devices screens, perfect for both indoor and outdoor activity. (All bone conduction headphones in the market will have sound leakage, which is normal when you keep the volume of your device over 70%)

【Upgraded Bone Conduction Headphones】 different from tradition headphones, bone conduction keeps you aware of surrounding, and delivers 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

【4.2 Version Bluetooth and Dual Pairing】the wireless headphone Bluetooth provides access to iOS/Android devices, like cell phones, desktop PC, or laptop, and enables dual Bluetooth devices pairing simultaneously. 4.2 Bluetooth ensures fast&stable connection and up to 10 meters barrier-free wireless range.

【Great Battery Longevity&IP6 Waterproof】built-in 250 mAh battery fully charged within 2 hours can support 10 day of Standby, 4 hours of playback and 3 hours of conversation. Actual battery using time may differ from volume and sound source. IP6 waterproof rating endure raining or sweat from outside activity and easy maintenance.

【Hand-Free Calling and Music】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 volume of bluetooth devices like cell phone at 50%-60% is recommended; maximum 100% volume may lead to sound leakage or echo during calling.