User Guide

English

Troubleshooting

Problem Solution

Ambient noise is not reduced. • 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.

The product produces rumbling noise. • 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.

Howling sound is caused. • 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.

Sound has become distorted. • Turn down the volume of audio/video equipment.

• Charge the product.

Sound buzzes and flutters. • The product may pick up noise from mobile phones or

equipment related to computers nearby. Keep the noise-

causing equipment away from the product.

The product cannot be charged. • Securely connect the included USB charging cable and

charge.