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Smart Bluetooth Sunglasses

--- The materials of frame and lens:  TR90 Nylon Frame. Polycarbonate lens.
Frames have protection against dripping water (IPX4 rating).They are waterproof and sweat proof to some degree. But they are not meant to be submerged under water, such as use during swimming or other water sports.
--- Replaceble lens: Polarized lens, anti-blue light lens, UV protection lens, pre-scription lens.
our smart glasses either with polarized lens or with anti-blue light lens or sun protection lens are 99% uv400 protected.
---Connectivity: Our smart glasses support industry-standard Bluetooth A2DP and Bluetooth HFP for phone calls or music listens.
---Easy operation, one button to play music, answer and reject phone calls, access to Siri, power on and off. One slider to adjust the volume.
--- Two hours charging, eight hours working.
---Five colors for your optional.