HKBTCH Wireless Earbuds, Wireless Headphones Bluetooth Headphones 3D HiFi Stereo Headphones with Charging Case, Noise Cancellation in-Ear Built-in Mic, IPX6 Waterproof for Work, Sport/Fitness/Work

【Automatic pairing】: This wireless ear buds uses Bluetooth connection technology, which enables users to connect successfully even at a sufficient distance. After a successful connection, the next use will be easy and fast. When you need to use, the headset will automatically connect with your device.