Standard frequency =300-3000 Hz
Maximum volume output = 129±5 dB
Input interference level : ≤28 dB
Operating temperature = 5-40
Storage temperature = 0-38
Dimensions L x W x H: 92 x 72 x 32 mm
Weight :62 g
Package included (One Set):
1 x XM-707T Hearing aid
3 x Earplug (different sizes)
1 x User manual
1 x Box
Adjust volume to the minimum before wearing.
Choose an earplug of slightly bigger size to avoid whistler.
Increase volume gradually to avoid sudden increase in sound.
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.
Keep the ear plug clean
Remove the battery if you don’t use it for long time.