Enjoy music without limits. Green Lion True Wireless Earbuds Pro 2 use master/slave mode, which enables your primary device to power the earbuds via Bluetooth 5.2, and they deliver clear immersive stereo sound quality. The latest audio technology has been used to make these headphones, giving you crystal clear sound that you have never heard before. A free silicone case that doubles as a charging dock is included with the earphones. With up to 5 hours of battery life, the Green Lion True Earbuds Pro 2 can be used for over an hour after just five minutes of charging. Your phone will automatically connect using the charging case if the initial connection is successful.