Description:
Increase volume gradually to avoid sudden increase in sound, adjust volume to the minimum before wearing.
Choose an earplug of slightly bigger size to avoid whistler.
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.
Need Battery: AG10 Button battery (Without Battery)
Specification:
Material: ABS Plastic+Silicone
Size: 61x41x16mm
Package Includes:
1Piece V-99 Hearing aid
4Piece Earplug (different sizes)
1Piece Carrying Bag
1Piece User manual