About whistler, you can do this 3 steps to remove it.
1. Choose a suitable earplug to make the product sealed in the ear canal
2. Low down the sound volume
3. When you put into battery , please be quick , to put the product into the ear
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.
Keep the ear plug clean
Remove the battery if you don’t use it for long time.
If you don’t know how to solv it, please contact the seller first
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.
5.Keep the ear plug clean.
Maximum Saturation Sound Pressure: 129dB 4dB
Maximum File Acoustic Gain: 48dB 5dB
Harmonic Distortion: ≤18%(450≤F≤5000)
Frequency Response: 450-3000Hz
Equivalent Input Noise: ≤ 30dB
Battery Type: Li-ion Battery
Operating Voltage: 0.20.1V
Operating Current: ≤ 4mA
Size: 1.8 x 1.4 x 1.6cm / 0.7 x 0.5 x 0.6in(H x L x T)
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