Pick up 2 headsets from charging case and they will connect each other automatically, then only one step easily enter mobile phone Bluetooth setting to pair the earbuds.Earbuds and charging case inner makes it possible to waterproof for 1 meters deep for 30 minutes. It is suitable for sports to prevent water. Ideal for sweating it out at the gym . Earbuds and case even can be washed by water and soap. Support HSP, HFP, A2DP, AVRCP, which greatly improve the transmission speed and providing you with a low-latency listening experience.