OldShark Bluetooth V4.1 Sunglasses Headsets Wireless Stereo Headphone Polarized Glasses or Driving Fishing Outdoor Activities + 3 Pairs Replaceable Polarized Lens POLARIZED UV PROTECTION BLUETOOTH SUNGLASSES  Enjoy musics and calls in the sun with the polarized lens , protecting your eyes and eyesight. EASY TO USE: 1.Long press the middle button for about 8-10 seconds until the red light alternate with the blue light(means the paring status). 2. Turn on your bluetooth device and connect it, then the light would stops flashing. HANDS-FREE CALLS: Steady signal and built-in microphone allows you enjoy the convenience of wireless communication.Hands-free calls when you are driving,mountain climbing or riding a bicycle. WIDELY COMPATIBLE: Bluetooth 4.1+EDR. Compatible with most bluetooth device, iPhone, Samsung, HTC, Sony, Moto.It can pair with devices up to 10 meters away (without obstacle). WHAT YOU GET: Bluetooth sunglasses, Glasses case, USB Cable, 3 pairs Polarized Lens, Cleaning cloth. OldShark provide 30 Days Money Back Guarantee-18 Month Warranty - Lifetime Friendly Customer Service.