OHO Bluetooth Sunglasses with Open Ear Technology Make Hands Free, Design for US and Comfort Wearing. <br> <br>Single Button Control for Power On and Calls, Enjoy the Freedom of Wireless Mobile Calls, Free Music, and more. <br> <br> Bluetooth Glasses is Compatible for all Version or Brand Name Mobile Phones, can Connect Two Smart Phones and Answer Calls from either one, but It is Not Bone Conduction sunglasses.<br><br><b>Specifications:</b><br>* Open Ear Speaker Wireless Bluetooth Sunglasses<br>* Music or Sound Come Out from Both Arms (Earphone Accessory Used when Needed<br>* CSR Bluetooth High-end Chipset<br>* US Safety Lens Standard ANSI/ISEA Z87.1-2015 Impact Resistant for Eye and Face Protection Devices <br>* 100% UV Protection Polarized Lens and FDA Audited<br>* Sweatproof Circling Sports Bluetooth Sunglasses<br>* Perfect Combination of Bluetooth Headphone and Sunglasses <br>* Transmit Distance:30ft <br>* Built-In Bluetooth 4.0 Speakers, Smart Assistant Voice Command,<br>* Voice Dialing from Your Phone List<br>* Speak for Directions, Weather or Traffic Updates<br>* Speak to Play Music from Your Favorite App Stations: Pandora , Spotify<br>* Bluetooth Sunglasses Compatible for All Android and IOS<br> * Bluetooth Protocol：Headset;Hands-free A2DP;BLE;SPP <br>* Listening Music for 3 hours by Open Ear Speaker<br>* Charging Time: 2 Hours by USB Cable<br>* Working Temp：-5℃ to 40℃<br>* Storage Temp：-20℃ to 60℃<br> <br><b>Accessory:</b> <br>*1M Data/Charging USB Cable<br>*Protective Cleaning Bag<br>*Instruction Manual<br>*Cleaning Cloth<br>*Hard Case