Low Equivalent Input Noise
Super Clear Sound
Low Frequency Cut Filter
Volume Control Mode: Rotated VC 0~25Db
Colors available：Beige, Red, Blue
1.Adjust volume to the minimum before wearing.
2.Choose an earplug of slightly bigger size to avoid whistler.
3.Increase volume gradually to avoid sudden increase in sound.
4.If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. If it still does not work, please check the chat window leave me a message.
5.Keep the ear plug clean.
6.Remove the battery if you don't use it for long time.