lasuney waterproof bluetooth 5.0 true wireless earbuds, 30h cyclic playtime headphones with charging case and mic, in-ear stereo earphones headset for sport-white lasuney 1. please removed the plastic films cover on the charging points of the earbuds and get them fully recharged before first use. <br>2. if you receive defective products or have any questions during use, please feel free to contact us.<br><br><b>advantages of t19 wireless earbuds</b><br>1.easily change between single and binaural mode and enjoy one-click operation.<br>2.convenient connection and continuous playtime give you incredible using experience.<br>3.light weight, easy to carry, you can use it anytime anywhere, just enjoy your life.<br><br><b>use the control button</b><br>volume-: click l control button 3 times<br>volume+: click r control button 3 times<br>previous song: hold l control button for 2s<br>next song: hold r control button for 2s<br>play / pause: one-click either control button<br>answer /end calls: one-click either control button<br>reject call: double-click either control button<br>activate siri: double-click either control button<br><br><b>reset steps(when the two earbuds can't pair with each other or can’t connect to your device):</b><br>1.delete all t19 records on bluetooth and turn off bluetooth as well.<br>2.long press both earbuds buttons for 8 seconds to turn off the earbuds.<br>3.seconds later, long press both buttons at the same time for 10 seconds until orange lights flash twice. reset completed.<br>4.put both earbuds back into the charging case. you can start to reconnect the t19 to your devices. <br>