Havit HAKII WIND II Audio Cycling Sunglasses

Photochromic Polarized Lenses + Electroplated Blue Polarized Lenses
Changes their color automatically to adapt to different level of sunlight.
They will darken in strong sunlight, and lighten in softer light or the dark, so you can use them in different envoirnments.
Reflected light from hard surfaces and reduces eye fatigue.
Bluetooth Version 5.2
Phone Call Noise Reduction Dual Microphone
Waterproof IPX5
Battery 150 mAh
Air-conduction
Stereo Sound Effect
Playtime 7-8 hours
Charging Time About 40 mins