Features 1.Directional Sound: Wireless bluetooth glasses use directional sound to keep the safety and accurately transmit the sound to your ears. 2.HiFi Sound Quality: Bluetooth glasses chip to headset and speaker optimization upgrade, to ensure effective reduction of call noise, restore fidelity. 3.Stable Performance: Smart bluetooth glasses use high version of Bluetooth solution, stable performance, strong compatibility, more powerful, to bring you high definition call sound quality. 4.Long Standby Time: Smart bluetooth glasses comes with a large capacity battery 100mAh, charging 90 minutes, 80 percent volume continuous listening music for 6 hours. 5.Waterproof Design: Smart glasses with accuracy craftsmanship, with water resistance, up to P5 level, effectively prevent the splash of water, sweat, and brief immersion. specificationItem Type: Bluetooth Glasses_x000D_ Material: TP90, PC, TAC_x000D_ Bluetooth Protocol: 50_x000D_ Charging Time: 90min_x000D_ Built in Polymer Lithium Battery: 100mAh_x000D_ Sound Channel: Dual Speakers, Stereo Sound PackageList1 xBluetoothGlasses1 x Charging Cable1 x Manual1 xCleaning Cloth