Upgraded Smart Bone Conduction Bluetooth Glasses with Open-Ear Headphones, Photochromic Blue Light Blocking Lenses, IPX6 Waterproof - Hands-Free Calls & Music - Perfect Gift for Dad & Men - Ideal for Running, Cycling & Outdoor Activities

All kinds of bone conduction headphones in the market transmit sound through vibrating bones. When the headphones are working, the outer shell of the earphone will be vibrated with the sounding vibrator inside. Then the outer shell vibrates the surrounding air, which may lead to sound leakage specially when the volume is at max. For best listening experience or when in quiet places, we recommend that customers can adjust the volume at 50%-60% of their bluetooth devices like cell phone, sound of smart glasses will NOT be noticeable by people aound 1-2 meters away. When in noisy environment, you can use the earplugs to cover your ears, so that you will hear the sound from glasses more clearly. Lightweight and Fashion Glasses for Women and Men Very lightweight with only 32g, the Bluetooth Glasses is comfortable to wear, Photochromic lenses with UV+420cut, filter out 99% of harmful blue light (400-440nm). No matter at day or at night, this smart glasses will protect your eyes. Great Battery Longetivity The bone conduction glasses comes with built-in 250 mAh battery, can be fully charged within 2 hours. After fully charged, the audio glasses can support 4 hours of playback and 3 hours of conversation. Product Specification Size 14.5*5.2*14.4 CM Item Weight 32g Speaker Type Bone conduction speakers Speaker Sensitivity 102~3dB Michrophone Sensitivity -40~3dB Waterproof Rating IP6 Lenses Photochromic lenses and anti blue ray Compatibility Compatible with both Android and iOS devices Bluetooth Bletooth version 4.2, supports dual Bluetooth devices pairing simultaneously Battery Detail Fully charged within 2 hours; Can support 4 hours of continuous playback and 3 hours of continuous conversation Package Inlcuded Smart glasses*1, lenses teamplates*2, USB chargeing cable*1, non slip pads*2, cloth pouch*1, user manual*1 How to test bone conduction To have better understanding and distinguishing, you can use the earplugs provided in the box, and play music or answer call. Though your ears are covered, you can still clearly hear the sound. We recommend you keep volume at 50%-60% for best listening experience; Maximum 100% volume may lead to echo during calling, or even lead to sounds transfer to people near you by air. How to test transition lenses To cover one lens with cloth, and put the whole glasses under sunlight, after 1-2 mins, you will see the change and difference of two lenses under difference UV intensity

Photochromic Lenses with UV420+ transition for automatic tint adjustment outdoors. Blue light glasses block bluerays for indoor and outdoor use. Note: Bone conduction headphones may have sound leakage if device volume is over 70%

Upgrade to Bone Conduction Headphones: Unique design keeps you aware of surroundings, delivering sound through skull bones to protect hearing. CAUTION: Not recommended for customers with bone conduction dB HL above 40dB HL for optimal listening

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

Exceptional Battery Life & IP6 Waterproof: A 250mAh battery fully charges in 2 hours for 10 days standby, 4 hours playback, and 3 hours talk time. Usage varies with volume. IP6 waterproofing withstands rain or sweat for outdoor use. Low maintenance. Enjoy extended battery life and durability

Hands-Free Calling and Music: These wireless smart glasses offer convenience while driving or jogging. Easily control volume, calls, and music with frame buttons. For optimal experience, maintain Bluetooth device volume at 50%-60%; higher volume may cause sound leakage or echo during calls