On Safety

• Do not put weight or pressure on the headphone amplifier as it may cause the headphone amplifier to deform during long storage.
• Do not drop the headphone amplifier or subject it to external shock, as it may cause a malfunction.
• Clean the headphone amplifier with a soft dry cloth.
• If there is noise while listening to the radio, etc., move the headphone amplifier farther away from the connected device.

On placement

Do not place the headphone amplifier in a location where it is:

• Subject to extremely high temperature (such as in a car with its windows closed).
• Subject to direct sunlight or near a heat source.
• Subject to mechanical vibration or shock.
• Subject to a magnetic field. (such as near a magnet, speaker or TV).
• Subject to excessive dust.

On charging

• When the headphone amplifier is stored for a long period, to prevent excessive discharge, charge the headphone amplifier every half year or so.