LED digital display screen, real-time monitoring of remaining power.The plug-in card does not need to be connected to a mobile phone, and the MP3 memory card (not included) can listen to songs without a mobile phone.The magnetic attraction design is convenient to store. The earphone is easy to store and not easy to fall down. It is really light and suitable for all day wear.Use the new Bluetooth 5.1 technology, full-function chip, smaller size, more stable processing capacity, lower power consumption, and longer endurance.45 inclination angle, providing comfortable wearing and excellent sound insulation and noise reduction effect. Sports ear cap, firmly against the lock ear, is not afraid to throw off.Large capacity battery, powered by low power consumption technology and chip low power consumption scheme, helps you listen to songs for 100 hours without turning off.