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Problem
Ambient noise is not reduced.
The product produces rumbling noise.
Howling sound is caused.
Sound has become distorted.
Sound buzzes and flutters.
The product cannot be charged.
Solution
• Make sure the indicator is on. Charge the battery if the
indicator does not light when the power/ANC switch is on.
• Adjust headphones' position. Headphones may be
incorrectly positioned on ears.
• Ambient noise may be out of synchronization with noise-
cancelling frequency.
• Connecting to some devices such as portable audio players
equipped with a digital amplifier can cause noise.
• Using the product in a car, bus, etc. may cause noise
depending on the road condition.
• Adjust headphones' position. Headphones may be
incorrectly positioned on ears.
• Do not touch the opening part in the housing. Touching or
covering the opening part can cause howling sound.
• Turn down the volume of audio/video equipment.
• Charge the product.
• The product may pick up noise from mobile phones or
equipment related to computers nearby. Keep the noise-
causing equipment away from the product.
• Securely connect the included USB charging cable and
charge.
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Troubleshooting
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