Kindly Remind

1.Before the first use，make the aid charge for 2 hours and then use it.
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.
5.Keep the ear plug clean.

Securely position the instrument into your ear. Once the hearing aid is properly seated in your ear,the howling will generally stop.