Oraimo Original OEB-E30D Shark 4 - Dual EQ - 20-hr Playtime - IPX5 Waterproof - Neckband Wireless Earphone Bluetooth Headset.

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 Day
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!

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 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 & Sweat Protection--Not Afraid of Water and Sweat
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.

Magnetic 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 1s

Volume+ :
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