Feature 1 Dual Speakers and Stereo: These glasses are equipped with left and right speakers, which can play directionally and have a real stereo effect. HIFI level audio decoding, which has been debugged by professional tuners and coordinated with hardware, makes HD music playing and voice clearer. 2 IVR Assistant: Press and hold for 2 seconds to activate and call the IVR assistant, and listen to instructions at any time and anywhere for free control. 3 Long Standby and Durable: 110mAh large battery storage, lasting for 5 hours to listen to music, and more than 200 hours of standby, waterproof and sweat proof, to meet your daily needs. 4 One Key Control: The left and right buttons have the same function, and you can switch songs and answer phone calls with a light press, making the operation more convenient. 5 Glare Filtering: Coated lenses can effectively block glare and strong light, provide effective eyes protection, and make colors more real.Item Type: Smart GlassesMaterial: ABSGross Weight: 106g / 3.7ozBT Protocol: BT 5.0Battery Type: 110mAh lithium battery(shipped with built in battery)Charging Time: 1-2 hoursReceiving Distance: 30 feet (9 meters)Speakers: dual speakers, stereoSupported Devices: support for iOS and for Android systems Package List1 x Glasses1 x Charging Cable1 x Glasses Cloth1 x Instruction