Bluetooth 5.2 and Automatic Pairing: This wireless bluetooth earbuds uses the advanced bluetooth 5.2 chip, which has extremely low power consumption and can provide a more stable and faster transmission speed. Removing the bluetooth ear buds will automatically connect to the last paired device. High Fidelity Audio and High-definition Call: The wireless headphones uses a 12mm graphene acoustic unit and is equipped with four microphones to ensure bass and stereo sound and achieve excellent high-definition sound with low latency. So you can get high-quality and clear calls.