Feature:1. ShortpresstheModebutton\"M\"oncetoswitchbetweenNormalModeandHavyBass Mode.2. The 2nd generation HavyBass algorithm will provide you an extraordanary experience of thumping bass like never before!3. 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!4. 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.Specification:Features:Short press the Mode button "M" once to switch between Normal Mode and HavyBass Mode.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!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.Featured with 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.Each earbuds has a built-in magnet to ensure tangle-free carrying and storage.Specifications:BT Version: V5.3Wireless Range: 10mBattery Capacity: 120mAhPlay Time: Up to 20 hoursInput: Type-CModelOEB-E30DPackage List:1 * EarphonePackage List:1 * Earphone