Features: *Equipped with BT Version 5.0, low power consumption, quick connetion speed which brings you an unprecedented experience. Supports noise reduction and high phone call quality. *The earbuds will automatically turn on and pair with each other when you take them out of the charging case. *Built-in rechargeable 50mAh earphone battery offers up to about 3 hours of talking time. Automatically charged in the 500mAh charging box. *Supports music playing and hands-free call. Equipped with function buttons which let you easily control your music and answer the phone call. *IPX4 waterproof design enables you to enjoy outdoor sports in rainy days, no worry about water and sweat.