Built-in magnet switch, when the magnet is separated/attracted, intelligently predicts your needs, without any key operation sweatproof design free while running, well-placed sweat headphones Our headphones are equipped with a waterproof nano-coating that protects against sweat for life. The ergonomic earhook secures the earphones in the ear without falling.Perfect for running, hiking, yoga, gym, fitness, traveling and etc 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