Lenovo Beacon - Manual (Page 20)

15
Safety and warranty guide
Data safety
Do not delete unknown files or change the name of files or directories that were
not created by you; otherwise, your computer software might fail to work.
Be aware that accessing network resources can leave your device vulnerable to
computer viruses, hackers, spyware, and other malicious activities that might
damage your device, software, or data. It is your responsibility to ensure that you
have adequate protection in the form of firewalls, antivirus software, and anti-
spyware software and keep this software up to date.
Cleaning and maintenance
Keep your device and workspace clean. Shut down the device and then
disconnect the power cord before cleaning the device. Do not spray any liquid
detergent directly on the device or use any detergent containing flammable material
to clean the device. Spray the detergent on a soft cloth and then wipe the device
surfaces.
Using headphones or earphones
If your device has both a headphone connector and an audio-out connector,
always use the headphone connector for headphones (also called a headset) or
earphones.
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 headphones or earphone connectors do not
comply with specifications of EN 50332-2. The headphone output connector of
your device complies with EN 50332-2 Sub clause 7. This specification limits the
device’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) for 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.