Bluetooth 4.0 technology for low energy consumption but more stable connection and fast transmission speed, efficient wireless operating distance is up to 10 meters Bluetooth wireless design to connect any Bluetooth enabled smart devices Enjoy great music singing by yourself Lift, distortion is less than 0.5%, fashionable outdoor bag design, effectively reduce the loss of sound quality, can be taken by hand. Enjoy music in every way. Perfect for picnic tours, parties, family fun, karaoke songs.