Product Parameters：BT Version: V5.3
Wireless Range: 10m
Battery Capacity: 120mAh
Play Time: Up to 20 hours
Input: Type-CModel：OEB-E30DProduct Features:HavyBass™ Dual EQ--Dual EQ, Switch As You Like
Short press the Mode button "M" once to switch between Normal Mode and HavyBass™Mode.HavyBass™, Unrivalled Deep Bass
The 2nd generation HavyBass™ algorithm will provide you an extraordanary experience of thumping bass like never before!20-hr Playtime & Quick Charge--Play All DayThe 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!Low-latency Game Mode--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.Dual Device Connection--Freely Switch to Another DeviceMagnetic Earbuds--One Click to Get Clutter-free
Each earbuds has a built-in magnet to ensure tangle-free carrying and storage.Remote Control--Tune Music with Fingers
All the simple click of these buttons to control your music and calls.Multi-functional Button:
Play/Pause Music——Press x 1
Answer/End Call——Press x 1
Reject Call——Long Press for 1sVolume+ :
Increase Volume——Press x 1
Next Track——Long Press for 1s

Volume- :
Decrease Volume——Press x 1
Last Track——Long Press for 1s

Mode Switch-M: 
EQ Switch(Normal---HavyBass)——Press x 1
Game Mode((Normal---Game Mode)——Long Press for 1s