Btootos Captivating sound and automatic pairing: The A90 Pro wireless headphones have a unique stereo design and 13 mm composite membranes, 43% bass amplification, providing a fully immersive listening experience. The wireless earbuds can automatically turn on and connect to the last paired device when you open the charging box, avoiding lengthy operations and saving time. Crystal clear calls: The Bluetooth in-ear headphones have 4 microphones, and ambient noise suppression technology (ENC) allows high call quality. The machine learning-based solution filters out ambient noise for good clarity. So your voice can be heard clearly during calls, video conferences, live streaming, etc. The Bluetooth earbuds are IPX7 waterproof and can withstand everyday splashes, sweat and rain.; Btootos