Description:Name: Smart GlassesLens: anti-blue light lens;Lens material: acrylic;Frame material: ABS+PC;Speaker type: Dynamic speaker;Microphone: -40dB±3dB;Compatible profile: A2DP, AVRCP, HSP, HFP;Transmission distance: 33 feet (10 meters);Battery: Rechargeable lithium-ion 75+75mAh;Continuous playback: 4-5 hours (normal volume);Standby time: 6 days;Charging time: 70 minutes;Waterproof class: IP67;Wireless connection version: CSR5.3;Working temperature: -10℃-+50℃ Humidity 0-90%;Packing list:1 x smart glasses1 x USB cable1 x glasses cloth1 x Instruction manual1 x Packaging box