Feature: 1. INTEGRATED SOUND AND VISION: Upgrade your visual and auditory experience with built in sound function, allowing you to listen to music, answer calls, and protect your eyes without the need for extra earphones. 2. BLUE LIGHT BLOCKING: The glasses feature blue ray protective lenses that reduce the harm caused by blue light to your eyes, prevent fatigue and provide comprehensive eye guard. 3. ENVIRONMENTAL AWARENESS: Stay safe during outdoor activities like cycling with the ability to listen to music and ambient sounds simultaneously. 4. LONG LASTING BATTERY: Powered by a built in 160mAh lithium ion battery, it offers up to 4 hours of playtime and 5 hours of call time, and 100 hours of standby time with just 1.5‑2 hours of charging. 5. USER FRIENDLY DESIGN: Lightweight and comfortable TR material, stable connection with wide range, supports various connection protocols for easy operation. Specification: Item Type: Smart Glasses Material: TR Connection: Bluetooth V5.3+EDR Protocol Support: HFP, HSP, A2DP, AVRCP Connection Distance: Approx. 10-15M / 32.81-49.21ft Microphone: Built in Playback Time: About 4 hours Talk Time: About 5 hours Charging Time: About 1.5-2 hours Standby Time: About 100 hours Battery Type: Built in 160mAh lithium ion battery. Package List: 1 x Smart Glasses 1 x Glasses Cloth 1 x Glasses Box 1 x User Manual 1 x Power Cord