User's Manual

completely eliminated.
• The mobile phone may cause interference and noise to the unit. If this happens, place the unit away from the
mobile phone.
• Do not cover the microphone of this unit with your hand, the ANC function may not function properly, or buzzing
may occur (squeak).
E.About bluetooth communication
• Bluetooth wireless technology works within a range of approximately 10m and may vary depending on the
obstacles (body, metal, wall, etc.) or the electromagnetic environment.
• Bluetooth communication may be interrupted, noise or audio loss may occur under the following conditions:
- There is someone between the unit and the bluetooth device.
- There are obstacles such as metal or wall between the unit and the bluetooth device.
- Devices using a 2.4GHz frequency, such as WI-FI devices, cordless phones, or microwaves, which are in use near this
unit.
• Because bluetooth devices and WI-FI use the same frequency (2.4GHz), microwave interference may occur if this
unit is used near a WI-FI device, causing noise or audio loss or communication interruption. In this case, do as
followings:
- Use the unit at least 10m away from the WI-FI device.
- If you use this unit within 10m from the WI-FI device, turn off the WI-FI device.
- Place the unit and bluetooth device as close as possible to each other.
• The microwave emitted from the bluetooth device may affect the operation of the electronic medical device. In the
following places, please turn off this unit and other bluetooth devices, or it may cause an accident.
- Store flammable gases in a hospital or gas station.
- Near automatic doors or fire alarm bell
- Always use the supplied earphone cable when using this unit on an airplane.
• Due to the nature of wireless technology, the sound played on this unit delays after sounds and music played on the
sending device. As a result, images and sounds may not be synchronized when watching movies or playing games.
• We assume no responsibility for any disclosure of information that may occur during the bluetooth communication.
• The connection to all bluetooth devices can not be guaranteed.
F.About charging
• Do not turn on the headphone and don’t use bluetooth while charging.
• If the headphone is not used for a long time, the rechargeable battery may not be able to retain enough power.
After repeated charge and discharge several times, the battery will be able to maintain the appropriate power
• If you store the unit for an extended period of time, charge the battery every six months to prevent over-discharge.