Upgrade Bluetooth 5.2 Using 5.2 Bluetooth chip master control low power consumption, the transmission distance is farther, faster, a wider range of sound, to bring you better high-fidelity sound quality Vibrate incoming calls Voice annunciation does not miss the answer, thoughtful design, so that you in the outdoor noisy environment Still can not miss the phone.Invisible pull-resistant wireLoad capacity of 6KG, a gentle pull, a key contraction, the longest pull wire can be pulled to 30CM