Bluetooth 5.1 chip: The wireless headset uses the Qualcomm QCC3020 chipset higher than Bluetooth 5.1, which can increase the transmission speed by 2 times and make the connection more stable without losing signal or music. Battery consumption is reduced by 50%, thus ensuring a longer headset life. Auto pairing: Take out 2 earphones, they will flash red and blue. Wait 5 seconds for the indicator light to go out to ensure that the Bluetooth headsets are automatically connected to each other. After connecting the headset to the phone, the headset will automatically pair with the device. Excellent sound quality: 14mm dynamic speaker allows you to experience high-quality 3D stereo with rich bass. In order to protect your ears from sound damage, the headset uses CVC 8.0 noise reduction technology to intelligently eliminate external noise and automatically adjust the noise reduction level. Portable Charging Box: The advanced Qualcomm chip has low power consumption, which means that the Bluetooth headset can be used continuously for 4 hours after being fully charged. The built-in 500mAh battery charging box can charge Bluetooth earphones about 5 times, providing 30 hours of playback time. High-quality sound and dual microphones, clearer calls: Unlike other TWS headsets, our original wireless headset allows you to experience both ears of call audio at the same time. The output level of our Bluetooth headset is high-definition stereo audio, which meets the recommended health standards.