Bluetooth Headphones, Grandbeing Bluetooth V4.1 Wireless Stereo Sweat-proof Sports / Gym / Runing Headphone Earbuds with Mic for iPhone 6s iPhone 6s Plus and Android Phones, Black Bluetooth wireless headphone - Bluetooth 4.1+EDR, and backward adapt V3.0V2.1 and so on. Effective distance is about 10 meters (Depend on environment, mobile phone and headset line distance). Smart voice reminding  With this function, you can clearly know the status about the headphone. There is a number reporter when a call come in. Stereo Sound. A good listening atmosphere will be created by this high quality headphone. With LED indicator light  The light will on when you are matching the digital equipment or charging the headphone. It will display the batterys capacity on your smart phone. Volume up /downCH+/CH- controleasy and convenient to operate.