Feature: 1. Directional Sound Transmission: Directional sound, keep it secret, and accurately transmit the sound to your ears. Get rid of the trouble of earphones in your ears. 2. Noise Reduction: The creation of Bluetooth sound glasses, upgrading chips, headsets and speakers to ensure effective reduction of call noise and restore fidelity. 3. HD Calls: Wireless Bluetooth glasses use high end Bluetooth, stable performance, strong compatibility, stronger functions, and bring you HD call quality. 4. Long Battery Life: Bluetooth glasses come with a large capacity battery, 100mAh, charge for 90 minutes, and listen to music continuously for 6 hours at 80% volume. 5. P5 Waterproof: Sports music glasses cooperate with accurate craftsmanship to achieve P5 waterproof and sweatproof, as well as short term soaking. Specification: Item Type: Smart Glasses Material: TP90, PC TAC Bluetooth Protocol: 5.0 Charging Time: 90min Built in Polymer Lithium Battery: 100mAh Channel: Dual Speakers, Stereo . Package List: 1 x Smart Glasses1 x Charging Cable1 x Manual1 x Glasses Cloth