1Blue Light Blocking Glasses: It can effectively isolate ultraviolet rays and radiation and can filter blue light, which is suitable for use when watching a computer, TV or mobile phone. Reduce eye strain and give you clear view to protect your eyes. 2Sound Directional Transmission Technology: The unique cavity frequency division technology can accurately project the sound to a specific area. Whether it is listening to music or making a call, only you can hear it. At the same time, you can also get the sound of the outside world, so that your safety is more secure. 3Ultra Light Frame: The frame uses a memory polymer material to fit the user's head curve, and the comfortable clamping force can effectively reduce the head pressure. 4Amplifier Bluetooth Chip: Support Bluetooth 5.0 protocol, four times the transmission distance of Bluetooth 4.2, double the transmission speed. It supports for Apt-X HD high quality audio, for THD-N super distortion technology and with 168 hours long standby. 54 Hours Music Time and 3 Hours Talking Time: Built in 90mAh polymer battery, it offers up to 4 hours of continuous music and 3 hours of talking time. Easy control for answering / ending calls, playing / pausing, previous / next songs. Item Type: Wireless Bluetooth SunglassesMaterial: PlasticProduct Color: As Pictures Shown Product Weight: Approx. 128g / 4.5ozConnection Method: Bluetooth ConnectionBuilt in Battery: Lithium Battery, 90mAhProduct Features: Voice calls and music playback 1 x Glasses1 x Data Cable2 x Pair of Glasses Temples1 x Manual