HavyBass, Unrivalled Deep Bass The 2nd generation HavyBass algorithm will provide you an extraordanary experience of thumping bass like never before! The battery life of Shark 4 could provide 20-hr playtime at most, which means could support playing around 300 songs when fully charged. Come on, enjoy the music all day! At the Center of the Game Game mode offer greater synchronization of audio with video for gaming, providing fluent experience while playing video or games. No need to worry about disruption in the game any more. Freely Switch to Another Device Shark 4 can connect 2 devices at the same time. Never worry about missing the calls from another phone. *Long press the Multi-functional button "O" and volume up button "M" at the same time for 2 seconds to connect to the second device. IPX5 waterproof and inner Sweat-resistant Nano-coating, oraimo Shark 4 is created to withstand the test of time, accompanying you through rain and workout time.