Features: - The smart glasses has built-in microphone enables you to hands-free calls with clarity. - Made of polarized lenses, the smart sunglasses has the characteristics of anti-glare, anti-UV, anti-fogging, take care of your eyes. - You can use this headphones smart sunglasses when for running, driving, cycling, hiking, hunting, fishing, traveling and living, etc. - You can hear surrounding sound while listening to music,answering phone call,therefore much safer than traditional earphones,headphones or earpieces that completely block out the sound around you. Specifications: Frame material: PC Standby: 150 hours Waterproof level: IP7 Frequency: 20Hz-20KHZ Earphone power: 32/0.5W Bluetooth distance: 10 meters Bluetooth version: V5.0+EDR Playing music: about 3-4 hours Storage temperature: -20°C-80°C Continuous talk time: about 4-5 hours Maximum input voltage: 5V / DC500mA Lithium battery: built-in 200mA polymer lithium battery Lens material: resin, polarizer,resisting UV400 Package included: 1 x Bluetooth Sunglasses Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.