ACTIVE NOISE CANCELLATION: A microphone integrated witnoise reduction technology that blocks ambient noise and allows you to focus on what you're listening to. The noise reduction function is continuously adjusted according to the fit degree of the earplugs, and reduces the ambient noise. Also, because both earphones have microphones, they can support both dual-channel high definition calls and single-ear mode, allowing you to be fully immersed in music, podcasting and calls. SUPERIOR SOUND QUALITY: I12 5.0 support bluetooth 5.0 technology, which is excellent in connection stability, signal effective distance, sound delay and system compatibility. Customized high amplitude, low distortion speaker driver unit, can bring strong bass. Super efficient high dynamic range amplifier, can present pure and clear sound, can automatically adjust the music play according to your ear shape, give you a delicate and consistent listening experience. POP-UPS AUTO PAIRING: Remove 2 headphones from the charging box and they will connect automatically. IOS 11 or later supports pop-up pairings, and a window displays the headphone power supply and the charging box power supply. With our instant pairing technology, our wireless earbuds can pair up in 3 seconds.