(Bluetooth 5.3 & Auto quick Pairing)Adopting advanced wireless technology,these bluetooth earbuds will automatically power on and connect with your device quickly once taking them out from the charging case (After the first successful connection).With upgraded Bluetooth 5.3 technology,you can get a faster transfer speed and a more stable connection,sync audio and video without delay,widely compatible with iOS/Android smartphones,TV,computer,Laptop,smart watch etc. (Hi-Fi Stereo Audio & Crystal-clear Call)Engineered with 13-mm dual-chamber speaker driver unit,these wireless earphones keep the sound crispand balanced with deep bass,delivering a surround sound experience that you can take with you anywhere.Besides,two built-in exclusive microphones enhance conference calls performance,make you sound clear and loud during phone calls.Good for web meeting and online class. (Ergonomic Design)We have built a database of thousands of people's experience of wearing our earbuds for more th