Products containing manganese dioxide lithium coin-cell batteries
may contain perchlorate.
Perchlorate Material - special handling may apply, See
www.dtsc.ca.gov/hazardouswaste/perchlorate
Using earphones, headphones, or a headset
•If your computer has both a headphone connector and an audio
line-out connector, always use the headphone connector for
earphones, headphones, or a headset. However, the headphone
connector does not support the microphone of the headset.
•If your computer has both a headset connector and an audio line-
out connector, always use the headset connector for earphones,
headphones, or a headset.
CAUTION:
Excessive sound pressure from earphones and headphones
can cause hearing loss. Adjustment of the equalizer to
maximum increases the earphone and headphone output
voltage and the sound pressure level. Therefore, to protect your
hearing, adjust the equalizer to an appropriate level.
Excessive use of headphones or earphones for a long period of time
at high volume can be dangerous if the output of the headphone or
earphone connectors do not comply with specifications of EN 50332-
2. The headphone output connector of your computer complies with
EN 50332-2 Sub clause 7. This specification limits the computer’s
maximum wide band true RMS output voltage to 150 mV. To help
protect against hearing loss, ensure that the headphones or
earphones you use also comply with EN 50332-2 (Clause 7 Limits)
or a wide band characteristic voltage of 75 mV. Using headphones
that do not comply with EN 50332-2 can be dangerous due to
excessive sound pressure levels.
If your Lenovo computer came with headphones or earphones in the
package, as a set, the combination of the headphones or earphones
and the computer already complies with the specifications of EN
50332-1. If different headphones or earphones are used, ensure that
they comply with EN 50332-1 (Clause 6.5 Limitation Values). Using
headphones that do not comply with EN 50332-1 can be dangerous
due to excessive sound pressure levels.
China altitude notice
Windows recovery solutions
Your computer might not come with a Microsoft®Windows®recovery
disc set or USB key. To restore the Windows operating system, see
the recovery information in the User Guide.See “Accessing your
User Guide” in this document for additional information.
Accessing your User Guide
Your User Guide contains detailed information about your computer.
To access your User Guide, do the following:
•Windows 10:
