Product Description Wireless Bluetooth 4.1 Magnetic Sports Stereo Headset Its light Weight, Sweat-proof & Noise-reduction. If you connect an iPhone, you can display the remaining power of the Bluetooth headset on the iOS system so that you can charge it. Built-in magnet switch, when the magnet is separated/attracted, intelligently predicts your needs, without any key operation. You can connect two headphones together when it not be used and can be worn like a necklace on your neck, which is a convenient way of carrying. Our headphones are equipped with a waterproof nano-coating that protects against sweat for life.