Bluetooth Headphones Koncen V4.1 Wireless Bluetooth Headsets Running Earphone Stereo in-Ear Noise Cancelling Sweatproof Gym Neckband with Mic Sports Earbuds (White&Gold) Lightweight and Comfortable Designed: The earbuds are designed to rotate to multiple angles to precisely adjust the fit to your ears for maximum comfort. You will hardly notice that you are wearing them while participating in sports and other high intensity activities. Built-in Microphone:You can use Siri with a simple 'yes' or 'no' to answer or decline a phone call. The excellent sound quality allows you to hear calls clearly while avoiding cutting in and out. Long Battery Life:The built-in 150mAh lithium-ion polymer battery provides up to 150hrs of stand-by and up to an amazing 8hrs of talk time and/or music. Battery life remaining indicator will be visible on your paired Bluetooth devices. Amazing Hi-Fi Sound Quality: The CVC6.0 noise cancellation technology intelligently filters ambient noise to perfectly play HD music.You've never heard music sound so good from wireless bluetooth headphones. Pair Withany 2 Devices: Our Bluetooth headphones can pair with 2 different Bluetooth devices simultaneously, such as an iPhone, iPad, Android phone and other Bluetooth enabled devices.