Bluetooth 5.1 headset: The headset uses Bluetooth 5.1 technology to make the signal connection faster and more stable, without delay, and provide you with a smoother call. It is also compatible with various types of mobile phones and computers to meet your multi-device useDual-device connection: the headset can be connected to two mobile devices at the same time, can freely switch calls and music, has an automatic pairing function, turn on the Bluetooth headset to automatically pair and connect to the mobile deviceHigh-resolution sound quality: Equipped with a dual noise cancellation system, the noise reduction function can eliminate the surrounding noise, the noise reduction microphone eliminates the noise of the call, and realizes the high-definition call180rotation adjustment: The bluetooth headset adopts ergonomic design, which can perfectly fit human ears. The earhook can be rotated 180to adjust the direction. Both left and right ears can be used. The hook is made of soft silicone material to ensure long-term wearing comfortExcellent water resistance: The earphones are waterproof, and the surface is coated and semi-sealed to prevent damage to the earphones caused by sweat and rain. The earphones are compatible with all devices that support Bluetooth connections