Features: Semi open loudspeaker design, surround stereo sound, 16.2mm speaker dynamic unit, rich sound detail. Bluetooth-compatible 5.0 chip, with smart clear noise reduction, stable and fast signal transmission, low delay and low power consumption, has strong compatibility, such as smart phones, tablets, devices with bluetooth-compatible, etc., to bring you high-definition call sound quality. Unique design, suitable for almost all face types, and the balanced weight ratio eyewear structure to reduce the weight bearing. One hand intelligent touch-control, just gently touched, you can complete calling, music playing, games and other instructions. Smart voice assistant, which can wake up your cellphone and unlock new positions for voice operation. Anti blue-light lens, clear and more eyes care, effectively filter harmful blue light, and relieve eye fatigue. IPX4 waterproof, easy to deal with various emergencies; large capacity battery, magnetic charging, durable and convenient, to meet daily need such as driving, cycling, etc. Specifications: Material: Resin Size: Approx. 178x75x80mm/7.00x2.95x3.14 inch Color: Black, Clear(optional) Model Name: E50 Bluetooth-compatible Headset Glasses Lens Material: UV400 anti ultra-violet or blue-light lens Battery Capacity: 100mAh Charging: about 2h Standby: 200 hours (with bluetooth-compatible connection) Working: about 5-7 hours Product Functions: novel appearance, bluetooth-compatible call, listen to music, navigation, voice assistant, rain/sweat proof, magnetic cable charging Bluetooth-compatible Protocol: BLE5.0 Microphone: built-in Speaker Unit: 16.2mm Suitable Occassions: for Driving, Travel or Outdoor use Note: Please allow 0-1cm error due to manual measurement. make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions. Package includes: 1x E50 Smart Glasses